void
test_basic(const size_t n, const double data[], const double tol)
{
gsl_rstat_workspace *rstat_workspace_p = gsl_rstat_alloc();
const double expected_mean = gsl_stats_mean(data, 1, n);
const double expected_var = gsl_stats_variance(data, 1, n);
const double expected_sd = gsl_stats_sd(data, 1, n);
const double expected_sd_mean = expected_sd / sqrt((double) n);
const double expected_skew = gsl_stats_skew(data, 1, n);
const double expected_kurtosis = gsl_stats_kurtosis(data, 1, n);
double expected_rms = 0.0;
double mean, var, sd, sd_mean, rms, skew, kurtosis;
size_t i, num;
int status;
/* compute expected rms */
for (i = 0; i < n; ++i)
expected_rms += data[i] * data[i];
expected_rms = sqrt(expected_rms / n);
/* add data to rstat workspace */
for (i = 0; i < n; ++i)
gsl_rstat_add(data[i], rstat_workspace_p);
mean = gsl_rstat_mean(rstat_workspace_p);
var = gsl_rstat_variance(rstat_workspace_p);
sd = gsl_rstat_sd(rstat_workspace_p);
sd_mean = gsl_rstat_sd_mean(rstat_workspace_p);
rms = gsl_rstat_rms(rstat_workspace_p);
skew = gsl_rstat_skew(rstat_workspace_p);
kurtosis = gsl_rstat_kurtosis(rstat_workspace_p);
num = gsl_rstat_n(rstat_workspace_p);
gsl_test_int(num, n, "n n=%zu" , n);
gsl_test_rel(mean, expected_mean, tol, "mean n=%zu", n);
gsl_test_rel(var, expected_var, tol, "variance n=%zu", n);
gsl_test_rel(sd, expected_sd, tol, "stddev n=%zu", n);
gsl_test_rel(sd_mean, expected_sd_mean, tol, "stddev_mean n=%zu", n);
gsl_test_rel(rms, expected_rms, tol, "rms n=%zu", n);
gsl_test_rel(skew, expected_skew, tol, "skew n=%zu", n);
gsl_test_rel(kurtosis, expected_kurtosis, tol, "kurtosis n=%zu", n);
status = gsl_rstat_reset(rstat_workspace_p);
gsl_test_int(status, GSL_SUCCESS, "rstat returned success");
num = gsl_rstat_n(rstat_workspace_p);
gsl_test_int(num, 0, "n n=%zu" , n);
gsl_rstat_free(rstat_workspace_p);
}
/**
* Tests that a given interpolation type reproduces the data points it is given,
* and then tests that it correctly reproduces additional values.
*
* @param xarr the x values of the points that define the function
* @param yarr the y values of the points that define the function
* @param zarr the values of the function at the points specified by xarr and yarr
* @param xsize the length of xarr
* @param ysize the length of yarr
* @param xval the x values of additional points at which to calculate interpolated values
* @param yval the y values of additional points at which to calculate interpolated values
* @param zval the expected results of the additional interpolations
* @param zxval the expected results of the x derivative calculations
* @param zyval the expected results of the y derivative calculations
* @param zxxval the expected results of the xx derivative calculations
* @param zyyval the expected results of the yy derivative calculations
* @param zxyval the expected results of the xy derivative calculations
* @param test_size the length of xval, yval, zval, etc.
* @param T the interpolation type
*/
int test_interp2d(const double xarr[], const double yarr[], const double zarr[], // interpolation data
size_t xsize, size_t ysize, // sizes of xarr and yarr
const double xval[], const double yval[], // test points
const double zval[], // expected results
const double zxval[], const double zyval[],
const double zxxval[], const double zyyval[], const double zxyval[],
size_t test_size, // number of test points
const interp2d_type* T) {
gsl_interp_accel *xa, *ya;
int status = 0;
size_t xi, yi, zi, i;
xa = gsl_interp_accel_alloc();
ya = gsl_interp_accel_alloc();
interp2d* interp = interp2d_alloc(T, xsize, ysize);
interp2d_spline* interp_s = interp2d_spline_alloc(T, xsize, ysize);
unsigned int min_size = interp2d_type_min_size(T);
gsl_test_int(min_size, T->min_size, "interp2d_type_min_size on %s", interp2d_name(interp));
interp2d_init(interp, xarr, yarr, zarr, xsize, ysize);
interp2d_spline_init(interp_s, xarr, yarr, zarr, xsize, ysize);
// First check that the interpolation reproduces the given points
for (xi = 0; xi < xsize; xi++) {
double x = xarr[xi];
for (yi = 0; yi < ysize; yi++) {
double y = yarr[yi];
zi = INDEX_2D(xi, yi, xsize, ysize);
test_single_low_level(&interp2d_eval, &interp2d_eval_e, interp, xarr, yarr, zarr, x, y, xa, ya, zarr, zi);
test_single_low_level(&interp2d_eval_no_boundary_check, &interp2d_eval_e_no_boundary_check, interp, xarr, yarr, zarr, x, y, xa, ya, zarr, zi);
test_single_high_level(&interp2d_spline_eval, &interp2d_spline_eval_e, interp_s, x, y, xa, ya, zarr, zi);
}
}
// Then check additional points provided
for (i = 0; i < test_size; i++) {
double x = xval[i];
double y = yval[i];
test_single_low_level(&interp2d_eval, &interp2d_eval_e, interp, xarr, yarr, zarr, x, y, xa, ya, zval, i);
test_single_low_level(&interp2d_eval_deriv_x, &interp2d_eval_deriv_x_e, interp, xarr, yarr, zarr, x, y, xa, ya, zxval, i);
test_single_low_level(&interp2d_eval_deriv_y, &interp2d_eval_deriv_y_e, interp, xarr, yarr, zarr, x, y, xa, ya, zyval, i);
test_single_low_level(&interp2d_eval_deriv_xx,&interp2d_eval_deriv_xx_e, interp, xarr, yarr, zarr, x, y, xa, ya, zxxval, i);
test_single_low_level(&interp2d_eval_deriv_yy,&interp2d_eval_deriv_yy_e, interp, xarr, yarr, zarr, x, y, xa, ya, zyyval, i);
test_single_low_level(&interp2d_eval_deriv_xy,&interp2d_eval_deriv_xy_e, interp, xarr, yarr, zarr, x, y, xa, ya, zxyval, i);
test_single_high_level(&interp2d_spline_eval, &interp2d_spline_eval_e, interp_s, x, y, xa, ya, zval, i);
test_single_high_level(&interp2d_spline_eval_deriv_x, &interp2d_spline_eval_deriv_x_e, interp_s, x, y, xa, ya, zxval, i);
test_single_high_level(&interp2d_spline_eval_deriv_y, &interp2d_spline_eval_deriv_y_e, interp_s, x, y, xa, ya, zyval, i);
test_single_high_level(&interp2d_spline_eval_deriv_xx,&interp2d_spline_eval_deriv_xx_e, interp_s, x, y, xa, ya, zxxval, i);
test_single_high_level(&interp2d_spline_eval_deriv_yy,&interp2d_spline_eval_deriv_yy_e, interp_s, x, y, xa, ya, zyyval, i);
test_single_high_level(&interp2d_spline_eval_deriv_xy,&interp2d_spline_eval_deriv_xy_e, interp_s, x, y, xa, ya, zxyval, i);
test_single_low_level(&interp2d_eval_no_boundary_check, &interp2d_eval_e_no_boundary_check, interp, xarr, yarr, zarr, x, y, xa, ya, zval, i);
}
gsl_interp_accel_free(xa);
gsl_interp_accel_free(ya);
interp2d_free(interp);
return status;
}
int
main (void)
{
double y, y_expected;
int e, e_expected;
gsl_ieee_env_setup ();
/* Test for expm1 */
y = gsl_expm1 (0.0);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(0.0)");
y = gsl_expm1 (1e-10);
y_expected = 1.000000000050000000002e-10;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(1e-10)");
y = gsl_expm1 (-1e-10);
y_expected = -9.999999999500000000017e-11;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(-1e-10)");
y = gsl_expm1 (0.1);
y_expected = 0.1051709180756476248117078264902;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(0.1)");
y = gsl_expm1 (-0.1);
y_expected = -0.09516258196404042683575094055356;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(-0.1)");
y = gsl_expm1 (10.0);
y_expected = 22025.465794806716516957900645284;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(10.0)");
y = gsl_expm1 (-10.0);
y_expected = -0.99995460007023751514846440848444;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(-10.0)");
/* Test for log1p */
y = gsl_log1p (0.0);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_log1p(0.0)");
y = gsl_log1p (1e-10);
y_expected = 9.9999999995000000000333333333308e-11;
gsl_test_rel (y, y_expected, 1e-15, "gsl_log1p(1e-10)");
y = gsl_log1p (0.1);
y_expected = 0.095310179804324860043952123280765;
gsl_test_rel (y, y_expected, 1e-15, "gsl_log1p(0.1)");
y = gsl_log1p (10.0);
y_expected = 2.3978952727983705440619435779651;
gsl_test_rel (y, y_expected, 1e-15, "gsl_log1p(10.0)");
/* Test for gsl_hypot */
y = gsl_hypot (0.0, 0.0);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(0.0, 0.0)");
y = gsl_hypot (1e-10, 1e-10);
y_expected = 1.414213562373095048801688e-10;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e-10, 1e-10)");
y = gsl_hypot (1e-38, 1e-38);
y_expected = 1.414213562373095048801688e-38;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e-38, 1e-38)");
y = gsl_hypot (1e-10, -1.0);
y_expected = 1.000000000000000000005;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e-10, -1)");
y = gsl_hypot (-1.0, 1e-10);
y_expected = 1.000000000000000000005;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(-1, 1e-10)");
y = gsl_hypot (1e307, 1e301);
y_expected = 1.000000000000499999999999e307;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e307, 1e301)");
y = gsl_hypot (1e301, 1e307);
y_expected = 1.000000000000499999999999e307;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e301, 1e307)");
y = gsl_hypot (1e307, 1e307);
y_expected = 1.414213562373095048801688e307;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e307, 1e307)");
/* Test +-Inf, finite */
y = gsl_hypot (GSL_POSINF, 1.2);
y_expected = GSL_POSINF;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(GSL_POSINF, 1.2)");
y = gsl_hypot (GSL_NEGINF, 1.2);
y_expected = GSL_POSINF;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(GSL_NEGINF, 1.2)");
y = gsl_hypot (1.2, GSL_POSINF);
y_expected = GSL_POSINF;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1.2, GSL_POSINF)");
y = gsl_hypot (1.2, GSL_NEGINF);
y_expected = GSL_POSINF;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1.2, GSL_NEGINF)");
/* Test NaN, finite */
y = gsl_hypot (GSL_NAN, 1.2);
y_expected = GSL_NAN;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(GSL_NAN, 1.2)");
y = gsl_hypot (1.2, GSL_NAN);
y_expected = GSL_NAN;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1.2, GSL_NAN)");
/* Test NaN, NaN */
y = gsl_hypot (GSL_NAN, GSL_NAN);
y_expected = GSL_NAN;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(GSL_NAN, GSL_NAN)");
/* Test +Inf, NaN */
y = gsl_hypot (GSL_POSINF, GSL_NAN);
y_expected = GSL_POSINF;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(GSL_POSINF, GSL_NAN)");
/* Test -Inf, NaN */
y = gsl_hypot (GSL_NEGINF, GSL_NAN);
y_expected = GSL_POSINF;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(GSL_NEGINF, GSL_NAN)");
/* Test NaN, +Inf */
y = gsl_hypot (GSL_NAN, GSL_POSINF);
y_expected = GSL_POSINF;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(GSL_NAN, GSL_POSINF)");
/* Test NaN, -Inf */
y = gsl_hypot (GSL_NAN, GSL_NEGINF);
y_expected = GSL_POSINF;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(GSL_NAN, GSL_NEGINF)");
/* Test for gsl_hypot3 */
y = gsl_hypot3 (0.0, 0.0, 0.0);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot3(0.0, 0.0, 0.0)");
y = gsl_hypot3 (1e-10, 1e-10, 1e-10);
y_expected = 1.732050807568877293527446e-10;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot3(1e-10, 1e-10, 1e-10)");
y = gsl_hypot3 (1e-38, 1e-38, 1e-38);
y_expected = 1.732050807568877293527446e-38;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot3(1e-38, 1e-38, 1e-38)");
y = gsl_hypot3 (1e-10, 1e-10, -1.0);
y_expected = 1.000000000000000000099;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot3(1e-10, 1e-10, -1)");
y = gsl_hypot3 (1e-10, -1.0, 1e-10);
y_expected = 1.000000000000000000099;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot3(1e-10, -1, 1e-10)");
y = gsl_hypot3 (-1.0, 1e-10, 1e-10);
y_expected = 1.000000000000000000099;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot3(-1, 1e-10, 1e-10)");
y = gsl_hypot3 (1e307, 1e301, 1e301);
y_expected = 1.0000000000009999999999995e307;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot3(1e307, 1e301, 1e301)");
y = gsl_hypot3 (1e307, 1e307, 1e307);
y_expected = 1.732050807568877293527446e307;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot3(1e307, 1e307, 1e307)");
y = gsl_hypot3 (1e307, 1e-307, 1e-307);
y_expected = 1.0e307;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot3(1e307, 1e-307, 1e-307)");
/* Test for acosh */
y = gsl_acosh (1.0);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_acosh(1.0)");
y = gsl_acosh (1.1);
y_expected = 4.435682543851151891329110663525e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_acosh(1.1)");
y = gsl_acosh (10.0);
y_expected = 2.9932228461263808979126677137742e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_acosh(10.0)");
y = gsl_acosh (1e10);
y_expected = 2.3718998110500402149594646668302e1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_acosh(1e10)");
/* Test for asinh */
y = gsl_asinh (0.0);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(0.0)");
y = gsl_asinh (1e-10);
y_expected = 9.9999999999999999999833333333346e-11;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(1e-10)");
y = gsl_asinh (-1e-10);
y_expected = -9.9999999999999999999833333333346e-11;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(1e-10)");
y = gsl_asinh (0.1);
y_expected = 9.983407889920756332730312470477e-2;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(0.1)");
y = gsl_asinh (-0.1);
y_expected = -9.983407889920756332730312470477e-2;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(-0.1)");
y = gsl_asinh (1.0);
y_expected = 8.8137358701954302523260932497979e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(1.0)");
y = gsl_asinh (-1.0);
y_expected = -8.8137358701954302523260932497979e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(-1.0)");
y = gsl_asinh (10.0);
y_expected = 2.9982229502979697388465955375965e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(10)");
y = gsl_asinh (-10.0);
y_expected = -2.9982229502979697388465955375965e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(-10)");
y = gsl_asinh (1e10);
y_expected = 2.3718998110500402149599646668302e1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(1e10)");
y = gsl_asinh (-1e10);
y_expected = -2.3718998110500402149599646668302e1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(-1e10)");
/* Test for atanh */
y = gsl_atanh (0.0);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(0.0)");
y = gsl_atanh (1e-20);
y_expected = 1e-20;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(1e-20)");
y = gsl_atanh (-1e-20);
y_expected = -1e-20;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(-1e-20)");
y = gsl_atanh (0.1);
y_expected = 1.0033534773107558063572655206004e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(0.1)");
y = gsl_atanh (-0.1);
y_expected = -1.0033534773107558063572655206004e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(-0.1)");
y = gsl_atanh (0.9);
y_expected = 1.4722194895832202300045137159439e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(0.9)");
y = gsl_atanh (-0.9);
y_expected = -1.4722194895832202300045137159439e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(0.9)");
/* Test for pow_int */
y = gsl_pow_2 (-3.14);
y_expected = pow (-3.14, 2.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_2(-3.14)");
y = gsl_pow_3 (-3.14);
y_expected = pow (-3.14, 3.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_3(-3.14)");
y = gsl_pow_4 (-3.14);
y_expected = pow (-3.14, 4.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_4(-3.14)");
y = gsl_pow_5 (-3.14);
y_expected = pow (-3.14, 5.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_5(-3.14)");
y = gsl_pow_6 (-3.14);
y_expected = pow (-3.14, 6.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_6(-3.14)");
y = gsl_pow_7 (-3.14);
y_expected = pow (-3.14, 7.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_7(-3.14)");
y = gsl_pow_8 (-3.14);
y_expected = pow (-3.14, 8.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_8(-3.14)");
y = gsl_pow_9 (-3.14);
y_expected = pow (-3.14, 9.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_9(-3.14)");
{
int n;
for (n = -9; n < 10; n++)
{
y = gsl_pow_int (-3.14, n);
y_expected = pow (-3.14, n);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_int(-3.14,%d)", n);
}
}
{
unsigned int n;
for (n = 0; n < 10; n++)
{
y = gsl_pow_uint (-3.14, n);
y_expected = pow (-3.14, n);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_uint(-3.14,%d)", n);
}
}
/* Test case for n at INT_MAX, INT_MIN */
{
double u = 1.0000001;
int n = INT_MAX;
y = gsl_pow_int (u, n);
y_expected = pow (u, n);
gsl_test_rel (y, y_expected, 1e-6, "gsl_pow_int(%.7f,%d)", u, n);
n = INT_MIN;
y = gsl_pow_int (u, n);
y_expected = pow (u, n);
gsl_test_rel (y, y_expected, 1e-6, "gsl_pow_int(%.7f,%d)", u, n);
}
/* Test for ldexp */
y = gsl_ldexp (M_PI, -2);
y_expected = M_PI_4;
gsl_test_rel (y, y_expected, 1e-15, "gsl_ldexp(pi,-2)");
y = gsl_ldexp (1.0, 2);
y_expected = 4.000000;
gsl_test_rel (y, y_expected, 1e-15, "gsl_ldexp(1.0,2)");
y = gsl_ldexp (0.0, 2);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_ldexp(0.0,2)");
y = gsl_ldexp (9.999999999999998890e-01, 1024);
y_expected = GSL_DBL_MAX;
gsl_test_rel (y, y_expected, 1e-15, "gsl_ldexp DBL_MAX");
y = gsl_ldexp (1e308, -2000);
y_expected = 8.7098098162172166755761e-295;
gsl_test_rel (y, y_expected, 1e-15, "gsl_ldexp(1e308,-2000)");
y = gsl_ldexp (GSL_DBL_MIN, 2000);
y_expected = 2.554675596204441378334779940e294;
gsl_test_rel (y, y_expected, 1e-15, "gsl_ldexp(DBL_MIN,2000)");
/* Test subnormals */
{
int i = 0;
volatile double x = GSL_DBL_MIN;
y_expected = 2.554675596204441378334779940e294;
x /= 2;
while (x > 0)
{
i++ ;
y = gsl_ldexp (x, 2000 + i);
gsl_test_rel (y, y_expected, 1e-15, "gsl_ldexp(DBL_MIN/2**%d,%d)",i,2000+i);
x /= 2;
}
}
/* Test for frexp */
y = gsl_frexp (0.0, &e);
y_expected = 0;
e_expected = 0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_frexp(0) fraction");
gsl_test_int (e, e_expected, "gsl_frexp(0) exponent");
y = gsl_frexp (M_PI, &e);
y_expected = M_PI_4;
e_expected = 2;
gsl_test_rel (y, y_expected, 1e-15, "gsl_frexp(pi) fraction");
gsl_test_int (e, e_expected, "gsl_frexp(pi) exponent");
y = gsl_frexp (2.0, &e);
y_expected = 0.5;
e_expected = 2;
gsl_test_rel (y, y_expected, 1e-15, "gsl_frexp(2.0) fraction");
gsl_test_int (e, e_expected, "gsl_frexp(2.0) exponent");
y = gsl_frexp (1.0 / 4.0, &e);
y_expected = 0.5;
e_expected = -1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_frexp(0.25) fraction");
gsl_test_int (e, e_expected, "gsl_frexp(0.25) exponent");
y = gsl_frexp (1.0 / 4.0 - 4.0 * GSL_DBL_EPSILON, &e);
y_expected = 0.999999999999996447;
e_expected = -2;
gsl_test_rel (y, y_expected, 1e-15, "gsl_frexp(0.25-eps) fraction");
gsl_test_int (e, e_expected, "gsl_frexp(0.25-eps) exponent");
y = gsl_frexp (GSL_DBL_MAX, &e);
y_expected = 9.999999999999998890e-01;
e_expected = 1024;
gsl_test_rel (y, y_expected, 1e-15, "gsl_frexp(DBL_MAX) fraction");
gsl_test_int (e, e_expected, "gsl_frexp(DBL_MAX) exponent");
y = gsl_frexp (-GSL_DBL_MAX, &e);
y_expected = -9.999999999999998890e-01;
e_expected = 1024;
gsl_test_rel (y, y_expected, 1e-15, "gsl_frexp(-DBL_MAX) fraction");
gsl_test_int (e, e_expected, "gsl_frexp(-DBL_MAX) exponent");
y = gsl_frexp (GSL_DBL_MIN, &e);
y_expected = 0.5;
e_expected = -1021;
gsl_test_rel (y, y_expected, 1e-15, "gsl_frexp(DBL_MIN) fraction");
gsl_test_int (e, e_expected, "gsl_frexp(DBL_MIN) exponent");
y = gsl_frexp (-GSL_DBL_MIN, &e);
y_expected = -0.5;
e_expected = -1021;
gsl_test_rel (y, y_expected, 1e-15, "gsl_frexp(-DBL_MIN) fraction");
gsl_test_int (e, e_expected, "gsl_frexp(-DBL_MIN) exponent");
/* Test subnormals */
{
int i = 0;
volatile double x = GSL_DBL_MIN;
y_expected = 0.5;
e_expected = -1021;
x /= 2;
while (x > 0)
{
e_expected--;
i++ ;
y = gsl_frexp (x, &e);
gsl_test_rel (y, y_expected, 1e-15, "gsl_frexp(DBL_MIN/2**%d) fraction",i);
gsl_test_int (e, e_expected, "gsl_frexp(DBL_MIN/2**%d) exponent", i);
x /= 2;
}
}
/* Test for approximate floating point comparison */
{
double x, y;
int i;
x = M_PI;
y = 22.0 / 7.0;
/* test the basic function */
for (i = 0; i < 10; i++)
{
double tol = pow (10, -i);
int res = gsl_fcmp (x, y, tol);
gsl_test_int (res, -(i >= 4), "gsl_fcmp(%.5f,%.5f,%g)", x, y, tol);
}
for (i = 0; i < 10; i++)
{
double tol = pow (10, -i);
int res = gsl_fcmp (y, x, tol);
gsl_test_int (res, (i >= 4), "gsl_fcmp(%.5f,%.5f,%g)", y, x, tol);
}
}
#if HAVE_IEEE_COMPARISONS
/* Test for isinf, isnan, finite */
{
double zero, one, inf, nan;
int s;
zero = 0.0;
one = 1.0;
inf = exp (1.0e10);
nan = inf / inf;
s = gsl_isinf (zero);
gsl_test_int (s, 0, "gsl_isinf(0)");
s = gsl_isinf (one);
gsl_test_int (s, 0, "gsl_isinf(1)");
s = gsl_isinf (inf);
gsl_test_int (s, 1, "gsl_isinf(inf)");
s = gsl_isinf (-inf);
gsl_test_int (s, -1, "gsl_isinf(-inf)");
s = gsl_isinf (nan);
gsl_test_int (s, 0, "gsl_isinf(nan)");
s = gsl_isnan (zero);
gsl_test_int (s, 0, "gsl_isnan(0)");
s = gsl_isnan (one);
gsl_test_int (s, 0, "gsl_isnan(1)");
s = gsl_isnan (inf);
gsl_test_int (s, 0, "gsl_isnan(inf)");
s = gsl_isnan (-inf);
gsl_test_int (s, 0, "gsl_isnan(-inf)");
s = gsl_isnan (nan);
gsl_test_int (s, 1, "gsl_isnan(nan)");
s = gsl_finite (zero);
gsl_test_int (s, 1, "gsl_finite(0)");
s = gsl_finite (one);
gsl_test_int (s, 1, "gsl_finite(1)");
s = gsl_finite (inf);
gsl_test_int (s, 0, "gsl_finite(inf)");
s = gsl_finite (-inf);
gsl_test_int (s, 0, "gsl_finite(-inf)");
s = gsl_finite (nan);
gsl_test_int (s, 0, "gsl_finite(nan)");
}
#endif
{
double x = gsl_fdiv (2.0, 3.0);
gsl_test_rel (x, 2.0 / 3.0, 4 * GSL_DBL_EPSILON, "gsl_fdiv(2,3)");
}
/* Test constants in gsl_math.h */
{
double x = log(M_E);
gsl_test_rel (x, 1.0, 4 * GSL_DBL_EPSILON, "ln(M_E)");
}
{
double x=pow(2.0,M_LOG2E);
gsl_test_rel (x, exp(1.0), 4 * GSL_DBL_EPSILON, "2^M_LOG2E");
}
{
double x=pow(10.0,M_LOG10E);
gsl_test_rel (x, exp(1.0), 4 * GSL_DBL_EPSILON, "10^M_LOG10E");
}
{
double x=pow(M_SQRT2, 2.0);
gsl_test_rel (x, 2.0, 4 * GSL_DBL_EPSILON, "M_SQRT2^2");
}
{
double x=pow(M_SQRT1_2, 2.0);
gsl_test_rel (x, 1.0/2.0, 4 * GSL_DBL_EPSILON, "M_SQRT1_2");
}
{
double x=pow(M_SQRT3, 2.0);
gsl_test_rel (x, 3.0, 4 * GSL_DBL_EPSILON, "M_SQRT3^2");
}
{
double x = M_PI;
gsl_test_rel (x, 3.1415926535897932384626433832795, 4 * GSL_DBL_EPSILON, "M_PI");
}
{
double x = 2 * M_PI_2;
gsl_test_rel (x, M_PI, 4 * GSL_DBL_EPSILON, "2*M_PI_2");
}
{
double x = 4 * M_PI_4;
gsl_test_rel (x, M_PI, 4 * GSL_DBL_EPSILON, "4*M_PI_4");
}
{
double x = pow(M_SQRTPI, 2.0);
gsl_test_rel (x, M_PI, 4 * GSL_DBL_EPSILON, "M_SQRTPI^2");
}
{
double x = pow(M_2_SQRTPI, 2.0);
gsl_test_rel (x, 4/M_PI, 4 * GSL_DBL_EPSILON, "M_SQRTPI^2");
}
{
double x = M_1_PI;
gsl_test_rel (x, 1/M_PI, 4 * GSL_DBL_EPSILON, "M_1_SQRTPI");
}
{
double x = M_2_PI;
gsl_test_rel (x, 2.0/M_PI, 4 * GSL_DBL_EPSILON, "M_2_PI");
}
{
double x = exp(M_LN10);
gsl_test_rel (x, 10, 4 * GSL_DBL_EPSILON, "exp(M_LN10)");
}
{
double x = exp(M_LN2);
gsl_test_rel (x, 2, 4 * GSL_DBL_EPSILON, "exp(M_LN2)");
}
{
double x = exp(M_LNPI);
gsl_test_rel (x, M_PI, 4 * GSL_DBL_EPSILON, "exp(M_LNPI)");
}
{
double x = M_EULER;
gsl_test_rel (x, 0.5772156649015328606065120900824, 4 * GSL_DBL_EPSILON, "M_EULER");
}
exit (gsl_test_summary ());
}
void
test_amax (void) {
{
int N = 1;
float X[] = { -0.388f };
int incX = -1;
int expected = 0;
int k;
k = cblas_isamax(N, X, incX);
gsl_test_int(k, expected, "samax(case 52)");
};
{
int N = 1;
double X[] = { 0.247 };
int incX = -1;
int expected = 0;
int k;
k = cblas_idamax(N, X, incX);
gsl_test_int(k, expected, "damax(case 53)");
};
{
int N = 1;
float X[] = { 0.704f, 0.665f };
int incX = -1;
int expected = 0;
int k;
k = cblas_icamax(N, X, incX);
gsl_test_int(k, expected, "camax(case 54)");
};
{
int N = 1;
double X[] = { -0.599, -0.758 };
int incX = -1;
int expected = 0;
int k;
k = cblas_izamax(N, X, incX);
gsl_test_int(k, expected, "zamax(case 55)");
};
{
int N = 2;
float X[] = { 0.909f, 0.037f };
int incX = 1;
int expected = 0;
int k;
k = cblas_isamax(N, X, incX);
gsl_test_int(k, expected, "samax(case 56)");
};
{
int N = 2;
double X[] = { 0.271, -0.426 };
int incX = 1;
int expected = 1;
int k;
k = cblas_idamax(N, X, incX);
gsl_test_int(k, expected, "damax(case 57)");
};
{
int N = 2;
float X[] = { -0.648f, 0.317f, 0.62f, 0.392f };
int incX = 1;
int expected = 1;
int k;
k = cblas_icamax(N, X, incX);
gsl_test_int(k, expected, "camax(case 58)");
};
{
int N = 2;
double X[] = { -0.789, 0.352, 0.562, 0.697 };
int incX = 1;
int expected = 1;
int k;
k = cblas_izamax(N, X, incX);
gsl_test_int(k, expected, "zamax(case 59)");
};
{
int N = 2;
float X[] = { 0.487f, 0.918f };
int incX = -1;
int expected = 0;
int k;
k = cblas_isamax(N, X, incX);
gsl_test_int(k, expected, "samax(case 60)");
};
{
int N = 2;
double X[] = { 0.537, 0.826 };
int incX = -1;
int expected = 0;
int k;
k = cblas_idamax(N, X, incX);
gsl_test_int(k, expected, "damax(case 61)");
};
{
int N = 2;
float X[] = { 0.993f, 0.172f, -0.825f, 0.873f };
int incX = -1;
int expected = 0;
int k;
k = cblas_icamax(N, X, incX);
gsl_test_int(k, expected, "camax(case 62)");
};
{
int N = 2;
double X[] = { 0.913, -0.436, -0.134, 0.129 };
int incX = -1;
int expected = 0;
int k;
k = cblas_izamax(N, X, incX);
gsl_test_int(k, expected, "zamax(case 63)");
};
}
int
main (void)
{
double y, y_expected;
gsl_ieee_env_setup ();
/* Test for expm1 */
y = gsl_expm1 (0.0); y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(0.0)");
y = gsl_expm1 (1e-10); y_expected = 1.000000000050000000002e-10;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(1e-10)");
y = gsl_expm1 (-1e-10); y_expected = -9.999999999500000000017e-11;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(-1e-10)");
y = gsl_expm1 (0.1); y_expected = 0.1051709180756476248117078264902;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(0.1)");
y = gsl_expm1 (-0.1); y_expected = -0.09516258196404042683575094055356;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(-0.1)");
y = gsl_expm1 (10.0); y_expected = 22025.465794806716516957900645284;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(10.0)");
y = gsl_expm1 (-10.0); y_expected = -0.99995460007023751514846440848444;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(-10.0)");
/* Test for log1p */
y = gsl_log1p (0.0); y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_log1p(0.0)");
y = gsl_log1p (1e-10); y_expected = 9.9999999995000000000333333333308e-11;
gsl_test_rel (y, y_expected, 1e-15, "gsl_log1p(1e-10)");
y = gsl_log1p (0.1); y_expected = 0.095310179804324860043952123280765;
gsl_test_rel (y, y_expected, 1e-15, "gsl_log1p(0.1)");
y = gsl_log1p (10.0); y_expected = 2.3978952727983705440619435779651;
gsl_test_rel (y, y_expected, 1e-15, "gsl_log1p(10.0)");
/* Test for gsl_hypot */
y = gsl_hypot (0.0, 0.0) ; y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(0.0, 0.0)");
y = gsl_hypot (1e-10, 1e-10) ; y_expected = 1.414213562373095048801688e-10;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e-10, 1e-10)");
y = gsl_hypot (1e-38, 1e-38) ; y_expected = 1.414213562373095048801688e-38;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e-38, 1e-38)");
y = gsl_hypot (1e-10, -1.0) ; y_expected = 1.000000000000000000005;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e-10, -1)");
y = gsl_hypot (-1.0, 1e-10) ; y_expected = 1.000000000000000000005;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(-1, 1e-10)");
y = gsl_hypot (1e307, 1e301) ; y_expected = 1.000000000000499999999999e307;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e307, 1e301)");
y = gsl_hypot (1e301, 1e307) ; y_expected = 1.000000000000499999999999e307;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e301, 1e307)");
y = gsl_hypot (1e307, 1e307) ; y_expected = 1.414213562373095048801688e307;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e307, 1e307)");
/* Test for acosh */
y = gsl_acosh (1.0); y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_acosh(1.0)");
y = gsl_acosh (1.1); y_expected = 4.435682543851151891329110663525e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_acosh(1.1)");
y = gsl_acosh (10.0); y_expected = 2.9932228461263808979126677137742e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_acosh(10.0)");
y = gsl_acosh (1e10); y_expected = 2.3718998110500402149594646668302e1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_acosh(1e10)");
/* Test for asinh */
y = gsl_asinh (0.0); y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(0.0)");
y = gsl_asinh (1e-10); y_expected = 9.9999999999999999999833333333346e-11;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(1e-10)");
y = gsl_asinh (-1e-10); y_expected = -9.9999999999999999999833333333346e-11;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(1e-10)");
y = gsl_asinh (0.1); y_expected = 9.983407889920756332730312470477e-2;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(0.1)");
y = gsl_asinh (-0.1); y_expected = -9.983407889920756332730312470477e-2;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(-0.1)");
y = gsl_asinh (1.0); y_expected = 8.8137358701954302523260932497979e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(1.0)");
y = gsl_asinh (-1.0); y_expected = -8.8137358701954302523260932497979e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(-1.0)");
y = gsl_asinh (10.0); y_expected = 2.9982229502979697388465955375965e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(10)");
y = gsl_asinh (-10.0); y_expected = -2.9982229502979697388465955375965e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(-10)");
y = gsl_asinh (1e10); y_expected = 2.3718998110500402149599646668302e1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(1e10)");
y = gsl_asinh (-1e10); y_expected = -2.3718998110500402149599646668302e1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(-1e10)");
/* Test for atanh */
y = gsl_atanh (0.0); y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(0.0)");
y = gsl_atanh (1e-20); y_expected = 1e-20;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(1e-20)");
y = gsl_atanh (-1e-20); y_expected = -1e-20;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(-1e-20)");
y = gsl_atanh (0.1); y_expected = 1.0033534773107558063572655206004e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(0.1)");
y = gsl_atanh (-0.1); y_expected = -1.0033534773107558063572655206004e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(-0.1)");
y = gsl_atanh (0.9); y_expected = 1.4722194895832202300045137159439e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(0.9)");
y = gsl_atanh (-0.9); y_expected = -1.4722194895832202300045137159439e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(0.9)");
/* Test for pow_int */
y = gsl_pow_2 (-3.14); y_expected = pow(-3.14, 2.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_2(-3.14)");
y = gsl_pow_3 (-3.14); y_expected = pow(-3.14, 3.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_3(-3.14)");
y = gsl_pow_4 (-3.14); y_expected = pow(-3.14, 4.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_4(-3.14)");
y = gsl_pow_5 (-3.14); y_expected = pow(-3.14, 5.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_5(-3.14)");
y = gsl_pow_6 (-3.14); y_expected = pow(-3.14, 6.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_6(-3.14)");
y = gsl_pow_7 (-3.14); y_expected = pow(-3.14, 7.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_7(-3.14)");
y = gsl_pow_8 (-3.14); y_expected = pow(-3.14, 8.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_8(-3.14)");
y = gsl_pow_9 (-3.14); y_expected = pow(-3.14, 9.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_9(-3.14)");
{
int n;
for (n = -9; n < 10; n++) {
y = gsl_pow_int (-3.14, n); y_expected = pow(-3.14, n);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_n(-3.14,%d)", n);
}
}
/* Test for isinf, isnan, finite*/
{
double zero, one, inf, nan;
int s;
zero = 0.0;
one = 1.0;
inf = exp(1.0e10);
nan = inf / inf;
s = gsl_isinf(zero);
gsl_test_int (s, 0, "gsl_isinf(0)");
s = gsl_isinf(one);
gsl_test_int (s, 0, "gsl_isinf(1)");
s = gsl_isinf(inf);
gsl_test_int (s, 1, "gsl_isinf(inf)");
s = gsl_isinf(-inf);
gsl_test_int (s, -1, "gsl_isinf(-inf)");
s = gsl_isinf(nan);
gsl_test_int (s, 0, "gsl_isinf(nan)");
s = gsl_isnan(zero);
gsl_test_int (s, 0, "gsl_isnan(0)");
s = gsl_isnan(one);
gsl_test_int (s, 0, "gsl_isnan(1)");
s = gsl_isnan(inf);
gsl_test_int (s, 0, "gsl_isnan(inf)");
s = gsl_isnan(nan);
gsl_test_int (s, 1, "gsl_isnan(nan)");
s = gsl_finite(zero);
gsl_test_int (s, 1, "gsl_finite(0)");
s = gsl_finite(one);
gsl_test_int (s, 1, "gsl_finite(1)");
s = gsl_finite(inf);
gsl_test_int (s, 0, "gsl_finite(inf)");
s = gsl_finite(nan);
gsl_test_int (s, 0, "gsl_finite(nan)");
}
{
double x = gsl_fdiv (2.0, 3.0);
gsl_test_rel (x, 2.0/3.0, 4*GSL_DBL_EPSILON, "gsl_fdiv(2,3)");
}
exit (gsl_test_summary ());
}
int
main (void)
{
double y, y_expected;
int e, e_expected;
gsl_ieee_env_setup ();
/* Test for expm1 */
y = gsl_expm1 (0.0);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(0.0)");
y = gsl_expm1 (1e-10);
y_expected = 1.000000000050000000002e-10;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(1e-10)");
y = gsl_expm1 (-1e-10);
y_expected = -9.999999999500000000017e-11;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(-1e-10)");
y = gsl_expm1 (0.1);
y_expected = 0.1051709180756476248117078264902;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(0.1)");
y = gsl_expm1 (-0.1);
y_expected = -0.09516258196404042683575094055356;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(-0.1)");
y = gsl_expm1 (10.0);
y_expected = 22025.465794806716516957900645284;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(10.0)");
y = gsl_expm1 (-10.0);
y_expected = -0.99995460007023751514846440848444;
gsl_test_rel (y, y_expected, 1e-15, "gsl_expm1(-10.0)");
/* Test for log1p */
y = gsl_log1p (0.0);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_log1p(0.0)");
y = gsl_log1p (1e-10);
y_expected = 9.9999999995000000000333333333308e-11;
gsl_test_rel (y, y_expected, 1e-15, "gsl_log1p(1e-10)");
y = gsl_log1p (0.1);
y_expected = 0.095310179804324860043952123280765;
gsl_test_rel (y, y_expected, 1e-15, "gsl_log1p(0.1)");
y = gsl_log1p (10.0);
y_expected = 2.3978952727983705440619435779651;
gsl_test_rel (y, y_expected, 1e-15, "gsl_log1p(10.0)");
/* Test for gsl_hypot */
y = gsl_hypot (0.0, 0.0);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(0.0, 0.0)");
y = gsl_hypot (1e-10, 1e-10);
y_expected = 1.414213562373095048801688e-10;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e-10, 1e-10)");
y = gsl_hypot (1e-38, 1e-38);
y_expected = 1.414213562373095048801688e-38;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e-38, 1e-38)");
y = gsl_hypot (1e-10, -1.0);
y_expected = 1.000000000000000000005;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e-10, -1)");
y = gsl_hypot (-1.0, 1e-10);
y_expected = 1.000000000000000000005;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(-1, 1e-10)");
y = gsl_hypot (1e307, 1e301);
y_expected = 1.000000000000499999999999e307;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e307, 1e301)");
y = gsl_hypot (1e301, 1e307);
y_expected = 1.000000000000499999999999e307;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e301, 1e307)");
y = gsl_hypot (1e307, 1e307);
y_expected = 1.414213562373095048801688e307;
gsl_test_rel (y, y_expected, 1e-15, "gsl_hypot(1e307, 1e307)");
/* Test for acosh */
y = gsl_acosh (1.0);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_acosh(1.0)");
y = gsl_acosh (1.1);
y_expected = 4.435682543851151891329110663525e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_acosh(1.1)");
y = gsl_acosh (10.0);
y_expected = 2.9932228461263808979126677137742e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_acosh(10.0)");
y = gsl_acosh (1e10);
y_expected = 2.3718998110500402149594646668302e1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_acosh(1e10)");
/* Test for asinh */
y = gsl_asinh (0.0);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(0.0)");
y = gsl_asinh (1e-10);
y_expected = 9.9999999999999999999833333333346e-11;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(1e-10)");
y = gsl_asinh (-1e-10);
y_expected = -9.9999999999999999999833333333346e-11;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(1e-10)");
y = gsl_asinh (0.1);
y_expected = 9.983407889920756332730312470477e-2;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(0.1)");
y = gsl_asinh (-0.1);
y_expected = -9.983407889920756332730312470477e-2;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(-0.1)");
y = gsl_asinh (1.0);
y_expected = 8.8137358701954302523260932497979e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(1.0)");
y = gsl_asinh (-1.0);
y_expected = -8.8137358701954302523260932497979e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(-1.0)");
y = gsl_asinh (10.0);
y_expected = 2.9982229502979697388465955375965e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(10)");
y = gsl_asinh (-10.0);
y_expected = -2.9982229502979697388465955375965e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(-10)");
y = gsl_asinh (1e10);
y_expected = 2.3718998110500402149599646668302e1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(1e10)");
y = gsl_asinh (-1e10);
y_expected = -2.3718998110500402149599646668302e1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_asinh(-1e10)");
/* Test for atanh */
y = gsl_atanh (0.0);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(0.0)");
y = gsl_atanh (1e-20);
y_expected = 1e-20;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(1e-20)");
y = gsl_atanh (-1e-20);
y_expected = -1e-20;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(-1e-20)");
y = gsl_atanh (0.1);
y_expected = 1.0033534773107558063572655206004e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(0.1)");
y = gsl_atanh (-0.1);
y_expected = -1.0033534773107558063572655206004e-1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(-0.1)");
y = gsl_atanh (0.9);
y_expected = 1.4722194895832202300045137159439e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(0.9)");
y = gsl_atanh (-0.9);
y_expected = -1.4722194895832202300045137159439e0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_atanh(0.9)");
/* Test for pow_int */
y = gsl_pow_2 (-3.14);
y_expected = pow (-3.14, 2.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_2(-3.14)");
y = gsl_pow_3 (-3.14);
y_expected = pow (-3.14, 3.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_3(-3.14)");
y = gsl_pow_4 (-3.14);
y_expected = pow (-3.14, 4.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_4(-3.14)");
y = gsl_pow_5 (-3.14);
y_expected = pow (-3.14, 5.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_5(-3.14)");
y = gsl_pow_6 (-3.14);
y_expected = pow (-3.14, 6.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_6(-3.14)");
y = gsl_pow_7 (-3.14);
y_expected = pow (-3.14, 7.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_7(-3.14)");
y = gsl_pow_8 (-3.14);
y_expected = pow (-3.14, 8.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_8(-3.14)");
y = gsl_pow_9 (-3.14);
y_expected = pow (-3.14, 9.0);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_9(-3.14)");
{
int n;
for (n = -9; n < 10; n++)
{
y = gsl_pow_int (-3.14, n);
y_expected = pow (-3.14, n);
gsl_test_rel (y, y_expected, 1e-15, "gsl_pow_n(-3.14,%d)", n);
}
}
/* Test for ldexp */
y = gsl_ldexp (M_PI, -2);
y_expected = M_PI_4;
gsl_test_rel (y, y_expected, 1e-15, "gsl_ldexp(pi,-2)");
y = gsl_ldexp (1.0, 2);
y_expected = 4.000000;
gsl_test_rel (y, y_expected, 1e-15, "gsl_ldexp(1.0,2)");
y = gsl_ldexp (0.0, 2);
y_expected = 0.0;
gsl_test_rel (y, y_expected, 1e-15, "gsl_ldexp(0.0,2)");
/* Test for frexp */
y = gsl_frexp (M_PI, &e);
y_expected = M_PI_4;
e_expected = 2;
gsl_test_rel (y, y_expected, 1e-15, "gsl_frexp(pi) fraction");
gsl_test_int (e, e_expected, "gsl_frexp(pi) exponent");
y = gsl_frexp (2.0, &e);
y_expected = 0.5;
e_expected = 2;
gsl_test_rel (y, y_expected, 1e-15, "gsl_frexp(2.0) fraction");
gsl_test_int (e, e_expected, "gsl_frexp(2.0) exponent");
y = gsl_frexp (1.0 / 4.0, &e);
y_expected = 0.5;
e_expected = -1;
gsl_test_rel (y, y_expected, 1e-15, "gsl_frexp(0.25) fraction");
gsl_test_int (e, e_expected, "gsl_frexp(0.25) exponent");
y = gsl_frexp (1.0 / 4.0 - 4.0 * GSL_DBL_EPSILON, &e);
y_expected = 0.999999999999996447;
e_expected = -2;
gsl_test_rel (y, y_expected, 1e-15, "gsl_frexp(0.25-eps) fraction");
gsl_test_int (e, e_expected, "gsl_frexp(0.25-eps) exponent");
/* Test for approximate floating point comparison */
{
double x, y;
int i;
x = M_PI;
y = 22.0 / 7.0;
/* test the basic function */
for (i = 0; i < 10; i++)
{
double tol = pow (10, -i);
int res = gsl_fcmp (x, y, tol);
gsl_test_int (res, -(i >= 4), "gsl_fcmp(%.5f,%.5f,%g)", x, y, tol);
}
for (i = 0; i < 10; i++)
{
double tol = pow (10, -i);
int res = gsl_fcmp (y, x, tol);
gsl_test_int (res, (i >= 4), "gsl_fcmp(%.5f,%.5f,%g)", y, x, tol);
}
}
#if HAVE_IEEE_COMPARISONS
/* Test for isinf, isnan, finite */
{
double zero, one, inf, nan;
int s;
zero = 0.0;
one = 1.0;
inf = exp (1.0e10);
nan = inf / inf;
s = gsl_isinf (zero);
gsl_test_int (s, 0, "gsl_isinf(0)");
s = gsl_isinf (one);
gsl_test_int (s, 0, "gsl_isinf(1)");
s = gsl_isinf (inf);
gsl_test_int (s, 1, "gsl_isinf(inf)");
s = gsl_isinf (-inf);
gsl_test_int (s, -1, "gsl_isinf(-inf)");
s = gsl_isinf (nan);
gsl_test_int (s, 0, "gsl_isinf(nan)");
s = gsl_isnan (zero);
gsl_test_int (s, 0, "gsl_isnan(0)");
s = gsl_isnan (one);
gsl_test_int (s, 0, "gsl_isnan(1)");
s = gsl_isnan (inf);
gsl_test_int (s, 0, "gsl_isnan(inf)");
s = gsl_isnan (nan);
gsl_test_int (s, 1, "gsl_isnan(nan)");
s = gsl_finite (zero);
gsl_test_int (s, 1, "gsl_finite(0)");
s = gsl_finite (one);
gsl_test_int (s, 1, "gsl_finite(1)");
s = gsl_finite (inf);
gsl_test_int (s, 0, "gsl_finite(inf)");
s = gsl_finite (nan);
gsl_test_int (s, 0, "gsl_finite(nan)");
}
#endif
{
double x = gsl_fdiv (2.0, 3.0);
gsl_test_rel (x, 2.0 / 3.0, 4 * GSL_DBL_EPSILON, "gsl_fdiv(2,3)");
}
exit (gsl_test_summary ());
}
/*
* Tests that a given interpolation type reproduces the data points
* it is given, and then tests that it correctly reproduces additional
* values.
*/
static int
test_interp2d(
const double xarr[], const double yarr[], const double zarr[], /* data */
size_t xsize, size_t ysize, /* array sizes */
const double xval[], const double yval[], /* test points */
const double zval[], /* expected results */
const double zxval[], const double zyval[],
const double zxxval[], const double zyyval[], const double zxyval[],
size_t test_size, /* number of test points */
const gsl_interp2d_type * T)
{
gsl_interp_accel *xa = gsl_interp_accel_alloc();
gsl_interp_accel *ya = gsl_interp_accel_alloc();
int status = 0;
size_t xi, yi, zi, i;
gsl_interp2d * interp = gsl_interp2d_alloc(T, xsize, ysize);
gsl_spline2d * interp_s = gsl_spline2d_alloc(T, xsize, ysize);
unsigned int min_size = gsl_interp2d_type_min_size(T);
gsl_test_int(min_size, T->min_size, "gsl_interp2d_type_min_size on %s", gsl_interp2d_name(interp));
gsl_interp2d_init(interp, xarr, yarr, zarr, xsize, ysize);
gsl_spline2d_init(interp_s, xarr, yarr, zarr, xsize, ysize);
/* First check that the interpolation reproduces the given points */
for (xi = 0; xi < xsize; xi++)
{
double x = xarr[xi];
for (yi = 0; yi < ysize; yi++)
{
double y = yarr[yi];
zi = gsl_interp2d_idx(interp, xi, yi);
test_single_low_level(&gsl_interp2d_eval, &gsl_interp2d_eval_e,
interp, xarr, yarr, zarr, x, y,
xa, ya, zarr, zi);
test_single_low_level(&gsl_interp2d_eval_extrap,
&gsl_interp2d_eval_e_extrap, interp,
xarr, yarr, zarr, x, y, xa, ya, zarr, zi);
test_single_high_level(&gsl_spline2d_eval, &gsl_spline2d_eval_e,
interp_s, x, y, xa, ya, zarr, zi);
}
}
/* Then check additional points provided */
for (i = 0; i < test_size; i++)
{
double x = xval[i];
double y = yval[i];
test_single_low_level(&gsl_interp2d_eval, &gsl_interp2d_eval_e, interp, xarr, yarr, zarr, x, y, xa, ya, zval, i);
test_single_low_level(&gsl_interp2d_eval_deriv_x, &gsl_interp2d_eval_deriv_x_e, interp, xarr, yarr, zarr, x, y, xa, ya, zxval, i);
test_single_low_level(&gsl_interp2d_eval_deriv_y, &gsl_interp2d_eval_deriv_y_e, interp, xarr, yarr, zarr, x, y, xa, ya, zyval, i);
test_single_low_level(&gsl_interp2d_eval_deriv_xx,&gsl_interp2d_eval_deriv_xx_e, interp, xarr, yarr, zarr, x, y, xa, ya, zxxval, i);
test_single_low_level(&gsl_interp2d_eval_deriv_yy,&gsl_interp2d_eval_deriv_yy_e, interp, xarr, yarr, zarr, x, y, xa, ya, zyyval, i);
test_single_low_level(&gsl_interp2d_eval_deriv_xy,&gsl_interp2d_eval_deriv_xy_e, interp, xarr, yarr, zarr, x, y, xa, ya, zxyval, i);
test_single_high_level(&gsl_spline2d_eval, &gsl_spline2d_eval_e, interp_s, x, y, xa, ya, zval, i);
test_single_high_level(&gsl_spline2d_eval_deriv_x, &gsl_spline2d_eval_deriv_x_e, interp_s, x, y, xa, ya, zxval, i);
test_single_high_level(&gsl_spline2d_eval_deriv_y, &gsl_spline2d_eval_deriv_y_e, interp_s, x, y, xa, ya, zyval, i);
test_single_high_level(&gsl_spline2d_eval_deriv_xx,&gsl_spline2d_eval_deriv_xx_e, interp_s, x, y, xa, ya, zxxval, i);
test_single_high_level(&gsl_spline2d_eval_deriv_yy,&gsl_spline2d_eval_deriv_yy_e, interp_s, x, y, xa, ya, zyyval, i);
test_single_high_level(&gsl_spline2d_eval_deriv_xy,&gsl_spline2d_eval_deriv_xy_e, interp_s, x, y, xa, ya, zxyval, i);
test_single_low_level(&gsl_interp2d_eval_extrap, &gsl_interp2d_eval_e_extrap, interp, xarr, yarr, zarr, x, y, xa, ya, zval, i);
}
gsl_interp_accel_free(xa);
gsl_interp_accel_free(ya);
gsl_interp2d_free(interp);
gsl_spline2d_free(interp_s);
return status;
}
int
main(int argc, char **argv)
{
size_t order, breakpoints, i;
gsl_ieee_env_setup();
argc = 0; /* prevent warnings about unused parameters */
argv = 0;
for (order = 1; order < 10; order++)
{
for (breakpoints = 2; breakpoints < 100; breakpoints++)
{
double a = -1.23 * order, b = 45.6 * order;
gsl_bspline_workspace *bw = gsl_bspline_alloc(order, breakpoints);
gsl_bspline_deriv_workspace *dbw = gsl_bspline_deriv_alloc(order);
gsl_bspline_knots_uniform(a, b, bw);
test_bspline(bw, dbw);
gsl_bspline_deriv_free(dbw);
gsl_bspline_free(bw);
}
}
for (order = 1; order < 10; order++)
{
for (breakpoints = 2; breakpoints < 100; breakpoints++)
{
double a = -1.23 * order, b = 45.6 * order;
gsl_bspline_workspace *bw = gsl_bspline_alloc(order, breakpoints);
gsl_bspline_deriv_workspace *dbw = gsl_bspline_deriv_alloc(order);
gsl_vector *k = gsl_vector_alloc(breakpoints);
for (i = 0; i < breakpoints; i++)
{
double f, x;
f = sqrt(i / (breakpoints - 1.0));
x = (1 - f) * a + f * b;
gsl_vector_set(k, i, x);
};
gsl_bspline_knots(k, bw);
test_bspline(bw, dbw);
gsl_vector_free(k);
gsl_bspline_deriv_free(dbw);
gsl_bspline_free(bw);
}
}
/* Spot check known 0th, 1st, 2nd derivative
evaluations for a particular k = 2 case. */
{
size_t i, j; /* looping */
const double xloc[4] = { 0.0, 1.0, 6.0, 7.0};
const double deriv[4][3] =
{
{ -1.0/2.0, 1.0/2.0, 0.0 },
{ -1.0/2.0, 1.0/2.0, 0.0 },
{ 0.0, -1.0/5.0, 1.0/5.0 },
{ 0.0, -1.0/5.0, 1.0/5.0 }
};
gsl_bspline_workspace *bw = gsl_bspline_alloc(2, 3);
gsl_bspline_deriv_workspace *dbw = gsl_bspline_deriv_alloc(2);
gsl_matrix *dB = gsl_matrix_alloc(gsl_bspline_ncoeffs(bw),
gsl_bspline_order(bw) + 1);
gsl_vector *breakpts = gsl_vector_alloc(3);
gsl_vector_set(breakpts, 0, 0.0);
gsl_vector_set(breakpts, 1, 2.0);
gsl_vector_set(breakpts, 2, 7.0);
gsl_bspline_knots(breakpts, bw);
for (i = 0; i < 4; ++i) /* at each location */
{
/* Initialize dB with poison to ensure we overwrite it */
gsl_matrix_set_all(dB, GSL_NAN);
gsl_bspline_deriv_eval(xloc[i], gsl_bspline_order(bw), dB, bw, dbw);
for (j = 0; j < gsl_bspline_ncoeffs(bw) ; ++j)
{
/* check basis function 1st deriv */
gsl_test_abs(gsl_matrix_get(dB, j, 1), deriv[i][j], GSL_DBL_EPSILON,
"b-spline k=%d basis #%d derivative %d at x = %f",
gsl_bspline_order(bw), j, 1, xloc[i]);
}
for (j = 0; j < gsl_bspline_ncoeffs(bw); ++j)
{
/* check k order basis function has k-th deriv equal to 0 */
gsl_test_abs(gsl_matrix_get(dB, j, gsl_bspline_order(bw)), 0.0,
GSL_DBL_EPSILON,
"b-spline k=%d basis #%d derivative %d at x = %f",
gsl_bspline_order(bw), j, gsl_bspline_order(bw),
xloc[i]);
}
}
gsl_matrix_free(dB);
gsl_bspline_deriv_free(dbw);
gsl_bspline_free(bw);
gsl_vector_free(breakpts);
}
/* Spot check known 0th, 1st, 2nd derivative
evaluations for a particular k = 3 case. */
{
size_t i, j; /* looping */
const double xloc[5] = { 0.0, 5.0, 9.0, 12.0, 15.0 };
const double eval[5][6] =
{
{ 4./25., 69./100., 3./ 20. , 0. , 0. , 0. },
{ 0. , 4./21. , 143./210. , 9./70., 0. , 0. },
{ 0. , 0. , 3./ 10. , 7./10., 0. , 0. },
{ 0. , 0. , 0. , 3./4. , 1./4., 0. },
{ 0. , 0. , 0. , 1./3. , 5./9., 1./9. }
};
const double deriv[5][6] =
{
{ -4./25., 3./50., 1./ 10., 0. , 0. , 0. },
{ 0. , -2./21., 1./105., 3./35., 0. , 0. },
{ 0. , 0. , -1./5. , 1./ 5., 0. , 0. },
{ 0. , 0. , 0. , -1./ 6., 1./6. , 0. },
{ 0. , 0. , 0. , -1./ 9., 1./27., 2./27. }
};
const double deriv2[5][6] =
{
{ 2./25., -17./150., 1.0/30.0 , 0.0 , 0. , 0. },
{ 0. , 1./ 42., -11.0/210.0, 1.0/35.0, 0. , 0. },
{ 0. , 0. , 1.0/15.0 ,-11.0/90.0, 1./18. , 0. },
{ 0. , 0. , 0.0 , 1.0/54.0, -7./162., 2./81. },
{ 0. , 0. , 0.0 , 1.0/54.0, -7./162., 2./81. }
};
gsl_bspline_workspace *bw = gsl_bspline_alloc(3, 5);
gsl_bspline_deriv_workspace *dbw = gsl_bspline_deriv_alloc(3);
gsl_matrix *dB = gsl_matrix_alloc(gsl_bspline_ncoeffs(bw),
gsl_bspline_order(bw) + 1);
gsl_vector *breakpts = gsl_vector_alloc(5);
gsl_vector_set(breakpts, 0, -3.0);
gsl_vector_set(breakpts, 1, 2.0);
gsl_vector_set(breakpts, 2, 9.0);
gsl_vector_set(breakpts, 3, 12.0);
gsl_vector_set(breakpts, 4, 21.0);
gsl_bspline_knots(breakpts, bw);
for (i = 0; i < 5; ++i) /* at each location */
{
/* Initialize dB with poison to ensure we overwrite it */
gsl_matrix_set_all(dB, GSL_NAN);
gsl_bspline_deriv_eval(xloc[i], gsl_bspline_order(bw), dB, bw, dbw);
/* check basis function evaluation */
for (j = 0; j < gsl_bspline_ncoeffs(bw); ++j)
{
gsl_test_abs(gsl_matrix_get(dB, j, 0), eval[i][j], GSL_DBL_EPSILON,
"b-spline k=%d basis #%d derivative %d at x = %f",
gsl_bspline_order(bw), j, 0, xloc[i]);
}
/* check 1st derivative evaluation */
for (j = 0; j < gsl_bspline_ncoeffs(bw); ++j)
{
gsl_test_abs(gsl_matrix_get(dB, j, 1), deriv[i][j], GSL_DBL_EPSILON,
"b-spline k=%d basis #%d derivative %d at x = %f",
gsl_bspline_order(bw), j, 1, xloc[i]);
}
/* check 2nd derivative evaluation */
for (j = 0; j < gsl_bspline_ncoeffs(bw); ++j)
{
gsl_test_abs(gsl_matrix_get(dB, j, 2), deriv2[i][j], GSL_DBL_EPSILON,
"b-spline k=%d basis #%d derivative %d at x = %f",
gsl_bspline_order(bw), j, 2, xloc[i]);
}
}
gsl_matrix_free(dB);
gsl_bspline_deriv_free(dbw);
gsl_bspline_free(bw);
gsl_vector_free(breakpts);
}
/* Check Greville abscissae functionality on a non-uniform k=1 */
{
size_t i; /* looping */
/* Test parameters */
const size_t k = 1;
const double bpoint_data[] = { 0.0, 0.2, 0.5, 0.75, 1.0 };
const size_t nbreak = sizeof(bpoint_data)/sizeof(bpoint_data[0]);
/* Expected results */
const double abscissae_data[] = { 0.1, 0.35, 0.625, 0.875 };
const size_t nabscissae = sizeof(abscissae_data)/sizeof(abscissae_data[0]);
gsl_vector_const_view bpoints = gsl_vector_const_view_array(bpoint_data, nbreak);
gsl_bspline_workspace *w = gsl_bspline_alloc(k, nbreak);
gsl_bspline_knots((const gsl_vector *) &bpoints, w);
gsl_test_int(nabscissae, gsl_bspline_ncoeffs(w),
"b-spline k=%d number of abscissae", k);
for (i = 0; i < nabscissae; ++i)
{
gsl_test_abs(gsl_bspline_greville_abscissa(i, w), abscissae_data[i], 2*k*GSL_DBL_EPSILON,
"b-spline k=%d Greville abscissa #%d at x = %f", k, i, abscissae_data[i]);
}
gsl_bspline_free(w);
}
/* Check Greville abscissae functionality on a non-uniform k=2 */
{
size_t i; /* looping */
/* Test parameters */
const size_t k = 2;
const double bpoint_data[] = { 0.0, 0.2, 0.5, 0.75, 1.0 };
const size_t nbreak = sizeof(bpoint_data)/sizeof(bpoint_data[0]);
/* Expected results */
const double abscissae_data[] = { 0.0, 0.2, 0.5, 0.75, 1.0 };
const size_t nabscissae = sizeof(abscissae_data)/sizeof(abscissae_data[0]);
gsl_vector_const_view bpoints = gsl_vector_const_view_array(bpoint_data, nbreak);
gsl_bspline_workspace *w = gsl_bspline_alloc(k, nbreak);
gsl_bspline_knots((const gsl_vector *) &bpoints, w);
gsl_test_int(nabscissae, gsl_bspline_ncoeffs(w),
"b-spline k=%d number of abscissae", k);
for (i = 0; i < nabscissae; ++i)
{
gsl_test_abs(gsl_bspline_greville_abscissa(i, w), abscissae_data[i], 2*k*GSL_DBL_EPSILON,
"b-spline k=%d Greville abscissa #%d at x = %f", k, i, abscissae_data[i]);
}
gsl_bspline_free(w);
}
/* Check Greville abscissae functionality on non-uniform k=3 */
{
size_t i; /* looping */
/* Test parameters */
const size_t k = 3;
const double bpoint_data[] = { 0.0, 0.2, 0.5, 0.75, 1.0 };
const size_t nbreak = sizeof(bpoint_data)/sizeof(bpoint_data[0]);
/* Expected results */
const double abscissae_data[] = { 0.0, 1.0/10.0, 7.0/20.0,
5.0/ 8.0, 7.0/ 8.0, 1.0 };
const size_t nabscissae = sizeof(abscissae_data)/sizeof(abscissae_data[0]);
gsl_vector_const_view bpoints = gsl_vector_const_view_array(bpoint_data, nbreak);
gsl_bspline_workspace *w = gsl_bspline_alloc(k, nbreak);
gsl_bspline_knots((const gsl_vector *) &bpoints, w);
gsl_test_int(nabscissae, gsl_bspline_ncoeffs(w),
"b-spline k=%d number of abscissae", k);
for (i = 0; i < nabscissae; ++i)
{
gsl_test_abs(gsl_bspline_greville_abscissa(i, w), abscissae_data[i], 2*k*GSL_DBL_EPSILON,
"b-spline k=%d Greville abscissa #%d at x = %f", k, i, abscissae_data[i]);
}
gsl_bspline_free(w);
}
/* Check Greville abscissae functionality on non-uniform k=4 */
{
size_t i; /* looping */
/* Test parameters */
const size_t k = 4;
const double bpoint_data[] = { 0.0, 0.2, 0.5, 0.75, 1.0 };
const size_t nbreak = sizeof(bpoint_data)/sizeof(bpoint_data[0]);
/* Expected results */
const double abscissae_data[] = { 0.0, 1.0/15.0, 7.0/30.0, 29.0/60.0,
3.0/ 4.0, 11.0/12.0, 1.0 };
const size_t nabscissae = sizeof(abscissae_data)/sizeof(abscissae_data[0]);
gsl_vector_const_view bpoints = gsl_vector_const_view_array(bpoint_data, nbreak);
gsl_bspline_workspace *w = gsl_bspline_alloc(k, nbreak);
gsl_bspline_knots((const gsl_vector *) &bpoints, w);
gsl_test_int(nabscissae, gsl_bspline_ncoeffs(w),
"b-spline k=%d number of abscissae", k);
for (i = 0; i < nabscissae; ++i)
{
gsl_test_abs(gsl_bspline_greville_abscissa(i, w), abscissae_data[i], 2*k*GSL_DBL_EPSILON,
"b-spline k=%d Greville abscissa #%d at x = %f", k, i, abscissae_data[i]);
}
gsl_bspline_free(w);
}
exit(gsl_test_summary());
}
int
main (void)
{
float zerof = 0.0f, minus_onef = -1.0f ;
double zero = 0.0, minus_one = -1.0 ;
/* Check for +ZERO (float) */
{
float f = 0.0f;
const char mantissa[] = "00000000000000000000000";
gsl_ieee_float_rep r;
gsl_ieee_float_to_rep (&f, &r);
gsl_test_int (r.sign, 0, "float x = 0, sign is +");
gsl_test_int (r.exponent, -127, "float x = 0, exponent is -127");
gsl_test_str (r.mantissa, mantissa, "float x = 0, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_ZERO, "float x = 0, type is ZERO");
}
/* Check for -ZERO (float) */
{
float f = minus_onef;
const char mantissa[] = "00000000000000000000000";
gsl_ieee_float_rep r;
while (f < 0) {
f *= 0.1f;
}
gsl_ieee_float_to_rep (&f, &r);
gsl_test_int (r.sign, 1, "float x = -1*0, sign is -");
gsl_test_int (r.exponent, -127, "float x = -1*0, exponent is -127");
gsl_test_str (r.mantissa, mantissa, "float x = -1*0, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_ZERO, "float x = -1*0, type is ZERO");
}
/* Check for a positive NORMAL number (e.g. 2.1) (float) */
{
float f = 2.1f;
const char mantissa[] = "00001100110011001100110";
gsl_ieee_float_rep r;
gsl_ieee_float_to_rep (&f, &r);
gsl_test_int (r.sign, 0, "float x = 2.1, sign is +");
gsl_test_int (r.exponent, 1, "float x = 2.1, exponent is 1");
gsl_test_str (r.mantissa, mantissa, "float x = 2.1, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_NORMAL, "float x = 2.1, type is NORMAL");
}
/* Check for a negative NORMAL number (e.g. -1.3304...) (float) */
{
float f = -1.3303577090924210f ;
const char mantissa[] = "01010100100100100101001";
gsl_ieee_float_rep r;
gsl_ieee_float_to_rep (&f, &r);
gsl_test_int (r.sign, 1, "float x = -1.3304..., sign is -");
gsl_test_int (r.exponent, 0, "float x = -1.3304..., exponent is 0");
gsl_test_str (r.mantissa, mantissa, "float x = -1.3304..., mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_NORMAL,
"float x = -1.3304..., type is NORMAL");
}
/* Check for a large positive NORMAL number (e.g. 3.37e31) (float) */
{
float f = 3.37e31f;
const char mantissa[] = "10101001010110101001001";
gsl_ieee_float_rep r;
gsl_ieee_float_to_rep (&f, &r);
gsl_test_int (r.sign, 0, "float x = 3.37e31, sign is +");
gsl_test_int (r.exponent, 104, "float x = 3.37e31, exponent is 104");
gsl_test_str (r.mantissa, mantissa, "float x = 3.37e31, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_NORMAL, "float x = 3.37e31, type is NORMAL");
}
/* Check for a small positive NORMAL number (e.g. 3.37e-31) (float) */
{
float f = 3.37e-31f;
const char mantissa[] = "10110101011100110111011";
gsl_ieee_float_rep r;
gsl_ieee_float_to_rep (&f, &r);
gsl_test_int (r.sign, 0, "float x = 3.37e-31, sign is +");
gsl_test_int (r.exponent, -102, "float x = 3.37e-31, exponent is -102");
gsl_test_str (r.mantissa, mantissa, "float x = 3.37e-31, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_NORMAL,
"float x = 3.37e-31, type is NORMAL");
}
/* Check for FLT_MIN (smallest possible number that is not denormal) */
{
float f = FLT_MIN;
const char mantissa[] = "00000000000000000000000";
gsl_ieee_float_rep r;
gsl_ieee_float_to_rep (&f, &r);
gsl_test_int (r.sign, 0, "float x = FLT_MIN, sign is +");
gsl_test_int (r.exponent, -126, "float x = FLT_MIN, exponent is -126");
gsl_test_str (r.mantissa, mantissa, "float x = FLT_MIN, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_NORMAL, "float x = FLT_MIN, type is NORMAL");
}
/* Check for FLT_MAX (largest possible number that is not Inf) */
{
float f = FLT_MAX;
const char mantissa[] = "11111111111111111111111";
gsl_ieee_float_rep r;
gsl_ieee_float_to_rep (&f, &r);
gsl_test_int (r.sign, 0, "float x = FLT_MAX, sign is +");
gsl_test_int (r.exponent, 127, "float x = FLT_MAX, exponent is 127");
gsl_test_str (r.mantissa, mantissa, "float x = FLT_MAX, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_NORMAL, "float x = FLT_MAX, type is NORMAL");
}
/* Check for DENORMAL numbers (e.g. FLT_MIN/2^n) */
#ifdef TEST_DENORMAL
{
float f = FLT_MIN;
char mantissa[] = "10000000000000000000000";
int i;
gsl_ieee_float_rep r;
for (i = 0; i < 23; i++)
{
float x = f / (float)pow (2.0, 1 + (float) i);
mantissa[i] = '1';
gsl_ieee_float_to_rep (&x, &r);
gsl_test_int (r.sign, 0, "float x = FLT_MIN/2^%d, sign is +", i + 1);
gsl_test_int (r.exponent, -127,
"float x = FLT_MIN/2^%d, exponent is -127", i + 1);
gsl_test_str (r.mantissa, mantissa,
"float x = FLT_MIN/2^%d, mantissa", i + 1);
gsl_test_int (r.type, GSL_IEEE_TYPE_DENORMAL,
"float x = FLT_MIN/2^%d, type is DENORMAL", i + 1);
mantissa[i] = '0';
}
}
#endif
/* Check for positive INFINITY (e.g. 2*FLT_MAX) */
{
float f = FLT_MAX;
const char mantissa[] = "00000000000000000000000";
gsl_ieee_float_rep r;
float x;
x = 2 * f;
gsl_ieee_float_to_rep (&x, &r);
gsl_test_int (r.sign, 0, "float x = 2*FLT_MAX, sign is +");
gsl_test_int (r.exponent, 128, "float x = 2*FLT_MAX, exponent is 128");
gsl_test_str (r.mantissa, mantissa, "float x = 2*FLT_MAX, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_INF, "float x = -2*FLT_MAX, type is INF");
}
/* Check for negative INFINITY (e.g. -2*FLT_MAX) */
{
float f = FLT_MAX;
const char mantissa[] = "00000000000000000000000";
gsl_ieee_float_rep r;
float x;
x = -2 * f;
gsl_ieee_float_to_rep (&x, &r);
gsl_test_int (r.sign, 1, "float x = -2*FLT_MAX, sign is -");
gsl_test_int (r.exponent, 128, "float x = -2*FLT_MAX, exponent is 128");
gsl_test_str (r.mantissa, mantissa, "float x = -2*FLT_MAX, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_INF, "float x = -2*FLT_MAX, type is INF");
}
/* Check for NAN (e.g. Inf - Inf) (float) */
{
gsl_ieee_float_rep r;
float x = 1.0f, y = 2.0f, z = zerof;
x = x / z;
y = y / z;
z = y - x;
gsl_ieee_float_to_rep (&z, &r);
/* We don't check the sign and we don't check the mantissa because
they could be anything for a NaN */
gsl_test_int (r.exponent, 128, "float x = NaN, exponent is 128");
gsl_test_int (r.type, GSL_IEEE_TYPE_NAN, "float x = NaN, type is NAN");
}
/* Check for +ZERO */
{
double d = 0.0;
const char mantissa[]
= "0000000000000000000000000000000000000000000000000000";
gsl_ieee_double_rep r;
gsl_ieee_double_to_rep (&d, &r);
gsl_test_int (r.sign, 0, "double x = 0, sign is +");
gsl_test_int (r.exponent, -1023, "double x = 0, exponent is -1023");
gsl_test_str (r.mantissa, mantissa, "double x = 0, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_ZERO, "double x = 0, type is ZERO");
}
/* Check for -ZERO */
{
double d = minus_one;
const char mantissa[]
= "0000000000000000000000000000000000000000000000000000";
gsl_ieee_double_rep r;
while (d < 0) {
d *= 0.1;
}
gsl_ieee_double_to_rep (&d, &r);
gsl_test_int (r.sign, 1, "double x = -1*0, sign is -");
gsl_test_int (r.exponent, -1023, "double x = -1*0, exponent is -1023");
gsl_test_str (r.mantissa, mantissa, "double x = -1*0, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_ZERO, "double x = -1*0, type is ZERO");
}
/* Check for a positive NORMAL number (e.g. 2.1) */
{
double d = 2.1;
const char mantissa[]
= "0000110011001100110011001100110011001100110011001101";
gsl_ieee_double_rep r;
gsl_ieee_double_to_rep (&d, &r);
gsl_test_int (r.sign, 0, "double x = 2.1, sign is +");
gsl_test_int (r.exponent, 1, "double x = 2.1, exponent is 1");
gsl_test_str (r.mantissa, mantissa, "double x = 2.1, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_NORMAL, "double x = 2.1, type is NORMAL");
}
/* Check for a negative NORMAL number (e.g. -1.3304...) */
{
double d = -1.3303577090924210146738460025517269968986511230468750;
const char mantissa[]
= "0101010010010010010100101010010010001000100011101110";
gsl_ieee_double_rep r;
gsl_ieee_double_to_rep (&d, &r);
gsl_test_int (r.sign, 1, "double x = -1.3304..., sign is -");
gsl_test_int (r.exponent, 0, "double x = -1.3304..., exponent is 0");
gsl_test_str (r.mantissa, mantissa, "double x = -1.3304..., mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_NORMAL,
"double x = -1.3304..., type is NORMAL");
}
/* Check for a large positive NORMAL number (e.g. 3.37e297) */
{
double d = 3.37e297;
const char mantissa[]
= "0100100111001001100101111001100000100110011101000100";
gsl_ieee_double_rep r;
gsl_ieee_double_to_rep (&d, &r);
gsl_test_int (r.sign, 0, "double x = 3.37e297, sign is +");
gsl_test_int (r.exponent, 988, "double x = 3.37e297, exponent is 998");
gsl_test_str (r.mantissa, mantissa, "double x = 3.37e297, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_NORMAL,
"double x = 3.37e297, type is NORMAL");
}
/* Check for a small positive NORMAL number (e.g. 3.37e-297) */
{
double d = 3.37e-297;
const char mantissa[]
= "0001101000011011101011100001110010100001001100110111";
gsl_ieee_double_rep r;
gsl_ieee_double_to_rep (&d, &r);
gsl_test_int (r.sign, 0, "double x = 3.37e-297, sign is +");
gsl_test_int (r.exponent, -985, "double x = 3.37e-297, exponent is -985");
gsl_test_str (r.mantissa, mantissa, "double x = 3.37e-297, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_NORMAL,
"double x = 3.37e-297, type is NORMAL");
}
/* Check for DBL_MIN (smallest possible number that is not denormal) */
{
double d = DBL_MIN;
const char mantissa[]
= "0000000000000000000000000000000000000000000000000000";
gsl_ieee_double_rep r;
gsl_ieee_double_to_rep (&d, &r);
gsl_test_int (r.sign, 0, "double x = DBL_MIN, sign is +");
gsl_test_int (r.exponent, -1022, "double x = DBL_MIN, exponent is -1022");
gsl_test_str (r.mantissa, mantissa, "double x = DBL_MIN, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_NORMAL,
"double x = DBL_MIN, type is NORMAL");
}
/* Check for DBL_MAX (largest possible number that is not Inf) */
{
double d = DBL_MAX;
const char mantissa[]
= "1111111111111111111111111111111111111111111111111111";
gsl_ieee_double_rep r;
gsl_ieee_double_to_rep (&d, &r);
gsl_test_int (r.sign, 0, "double x = DBL_MAX, sign is +");
gsl_test_int (r.exponent, 1023, "double x = DBL_MAX, exponent is 1023");
gsl_test_str (r.mantissa, mantissa, "double x = DBL_MAX, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_NORMAL,
"double x = DBL_MAX, type is NORMAL");
}
/* Check for DENORMAL numbers (e.g. DBL_MIN/2^n) */
#ifdef TEST_DENORMAL
{
double d = DBL_MIN;
char mantissa[]
= "1000000000000000000000000000000000000000000000000000";
int i;
gsl_ieee_double_rep r;
for (i = 0; i < 52; i++)
{
double x = d / pow (2.0, 1 + (double) i);
mantissa[i] = '1';
gsl_ieee_double_to_rep (&x, &r);
gsl_test_int (r.sign, 0, "double x = DBL_MIN/2^%d, sign is +", i + 1);
gsl_test_int (r.exponent, -1023,
"double x = DBL_MIN/2^%d, exponent", i + 1);
gsl_test_str (r.mantissa, mantissa,
"double x = DBL_MIN/2^%d, mantissa", i + 1);
gsl_test_int (r.type, GSL_IEEE_TYPE_DENORMAL,
"double x = DBL_MIN/2^%d, type is DENORMAL", i + 1);
mantissa[i] = '0';
}
}
#endif
/* Check for positive INFINITY (e.g. 2*DBL_MAX) */
{
double d = DBL_MAX;
const char mantissa[]
= "0000000000000000000000000000000000000000000000000000";
gsl_ieee_double_rep r;
double x;
x = 2.0 * d;
gsl_ieee_double_to_rep (&x, &r);
gsl_test_int (r.sign, 0, "double x = 2*DBL_MAX, sign is +");
gsl_test_int (r.exponent, 1024, "double x = 2*DBL_MAX, exponent is 1024");
gsl_test_str (r.mantissa, mantissa, "double x = 2*DBL_MAX, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_INF, "double x = 2*DBL_MAX, type is INF");
}
/* Check for negative INFINITY (e.g. -2*DBL_MAX) */
{
double d = DBL_MAX;
const char mantissa[]
= "0000000000000000000000000000000000000000000000000000";
gsl_ieee_double_rep r;
double x;
x = -2.0 * d;
gsl_ieee_double_to_rep (&x, &r);
gsl_test_int (r.sign, 1, "double x = -2*DBL_MAX, sign is -");
gsl_test_int (r.exponent, 1024, "double x = -2*DBL_MAX, exponent is 1024");
gsl_test_str (r.mantissa, mantissa, "double x = -2*DBL_MAX, mantissa");
gsl_test_int (r.type, GSL_IEEE_TYPE_INF,"double x = -2*DBL_MAX, type is INF");
}
/* Check for NAN (e.g. Inf - Inf) */
{
gsl_ieee_double_rep r;
double x = 1.0, y = 2.0, z = zero;
x = x / z;
y = y / z;
z = y - x;
gsl_ieee_double_to_rep (&z, &r);
/* We don't check the sign and we don't check the mantissa because
they could be anything for a NaN */
gsl_test_int (r.exponent, 1024, "double x = NaN, exponent is 1024");
gsl_test_int (r.type, GSL_IEEE_TYPE_NAN, "double x = NaN, type is NAN");
}
exit (gsl_test_summary ());
}
