inline double dcdflib_beta_quantile(double p, double a, double b)
{
int what = 2;
int status = 0;
double x, y, bound, q(1 - p);
cdfbet(&what, &p, &q, &x, &y, &a, &b, &status, &bound);
return x;
}
inline double dcdflib_beta_cdf(double x, double a, double b)
{
int what = 1;
int status = 0;
double p, q, bound, y(1-x);
cdfbet(&what, &p, &q, &x, &y, &a, &b, &status, &bound);
return p;
}
void V_cdfbet(int *which, double *p, double *q, double *x, double *y,
double *a, double *b, int *status, double *bound, int *len)
{
int i;
for (i = 0; i < *len; i++) {
cdfbet((int *)which, &p[i], &q[i], &x[i], &y[i],
&a[i], &b[i], (int *)&status[i], &bound[i]);
}
}
static int cdf_pbeta (lua_State *L) {
/* stack should contain x, a and b */
lua_Number x = luaL_checknumber(L, 1);
lua_Number a = luaL_checknumber(L, 2);
lua_Number b = luaL_checknumber(L, 3);
lua_Number p, q, y, bound;
int which = 1;
int status;
check_beta(L, 1, x, a, b);
y = 1-x;
cdfbet(&which, &p, &q, &x, &y, &a, &b, &status, &bound);
check_status(status, bound);
lua_pushnumber(L, p);
return 1;
}
static int cdf_qbeta (lua_State *L) {
/* stack should contain x, a and b */
lua_Number p = luaL_checknumber(L, 1);
lua_Number a = luaL_checknumber(L, 2);
lua_Number b = luaL_checknumber(L, 3);
lua_Number x;
check_beta(L, 2, p, a, b);
if (p==0 || p==1) x = p;
else {
lua_Number q, y, bound;
int which = 2;
int status;
q = 1-p;
cdfbet(&which, &p, &q, &x, &y, &a, &b, &status, &bound);
check_status(status, bound);
}
lua_pushnumber(L, x);
return 1;
}
