void LinearSlopeFit::fit()
{
if (d_init_err)
return;
if (d_p > d_n){
QMessageBox::critical((ApplicationWindow *)parent(), tr("QtiPlot - Fit Error"),
tr("You need at least %1 data points for this fit operation. Operation aborted!").arg(d_p));
return;
}
double c1, cov11;
if (d_weighting == NoWeighting)
gsl_fit_mul(d_x, 1, d_y, 1, d_n, &c1, &cov11, &chi_2);
else
gsl_fit_wmul(d_x, 1, d_w, 1, d_y, 1, d_n, &c1, &cov11, &chi_2);
d_results[0] = c1;
gsl_matrix_set(covar, 0, 0, cov11);
generateFitCurve();
ApplicationWindow *app = (ApplicationWindow *)parent();
if (app->writeFitResultsToLog)
app->updateLog(logFitInfo(0, 0));
}
CAMLprim value ml_gsl_fit_mul(value wo, value x, value y)
{
value r;
size_t N=Double_array_length(x);
double c1,cov11,sumsq;
if(Double_array_length(y) != N)
GSL_ERROR("array sizes differ", GSL_EBADLEN);
if(wo == Val_none)
gsl_fit_mul(Double_array_val(x), 1, Double_array_val(y), 1, N,
&c1, &cov11, &sumsq);
else {
value w=Field(wo, 0);
if(Double_array_length(w) != N)
GSL_ERROR("array sizes differ", GSL_EBADLEN);
gsl_fit_wmul(Double_array_val(x), 1,
Double_array_val(w), 1,
Double_array_val(y), 1, N,
&c1, &cov11, &sumsq);
}
r=alloc_small(3 * Double_wosize, Double_array_tag);
Store_double_field(r, 0, c1);
Store_double_field(r, 1, cov11);
Store_double_field(r, 2, sumsq);
return r;
}
static VALUE rb_gsl_fit_mul(int argc, VALUE *argv, VALUE obj)
{
double *ptrx, *ptry;
double c1, cov11, sumsq;
int status;
size_t n, stridex, stridey;
switch (argc) {
case 2:
ptrx = get_vector_ptr(argv[0], &stridex, &n);
ptry = get_vector_ptr(argv[1], &stridey, &n);
break;
case 3:
CHECK_FIXNUM(argv[2]);
ptrx = get_vector_ptr(argv[0], &stridex, &n);
ptry = get_vector_ptr(argv[1], &stridey, &n);
n = FIX2INT(argv[2]);
break;
default:
rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 or 3)", argc);
break;
}
status = gsl_fit_mul(ptrx, stridex, ptry, stridey, n, &c1, &cov11, &sumsq);
return rb_ary_new3(4, rb_float_new(c1),
rb_float_new(cov11), rb_float_new(sumsq), INT2FIX(status));
}
pure_expr* wrap_gsl_fit_mul(double* x, double* y, size_t n)
{
double c1, cov11, sumsq;
gsl_fit_mul(x, 1, y, 1, n, &c1, &cov11, &sumsq);
return pure_listl(3, pure_double(c1), pure_double(cov11), pure_double(sumsq));
}
int main()
{
int num_phasecodes[MAX_CARDS],num_cards[MAX_CARDS],num_freqs[MAX_CARDS],active[MAX_CARDS];
int i,b,c,ii,cc,count,summary_freqs;
int f,d,p,o;
double offset,slope,slope_variance,sumsq;
double best_sumsq[MAX_PHASES],best_offset[MAX_PHASES],best_slope[MAX_PHASES],best_var[MAX_PHASES];
char tmp;
int lowest_pwr_mag_index[3]={-1,-1,-1}; // freq,card,phasecode
double lowest_pwr_mag=1E10; // freq,card,phasecode
int highest_time_delay_card[MAX_FREQS]; // freq
double highest_time_delay[MAX_FREQS];
double *freq[MAX_CARDS],*phase[MAX_FREQS][MAX_CARDS];
double *pwr_mag[MAX_FREQS][MAX_CARDS];
double *timedelay1[MAX_FREQS][MAX_CARDS];
double *timedelay2[MAX_FREQS][MAX_CARDS];
double minimum_timedelay=0;
double Y[MAX_FREQS],time0[MAX_FREQS];
char filename1[120];
char filename2[120];
double max_Y;
double diff,var,max_var[13],max_var0;
int hmm;
for(i=0;i<MAX_FREQS;i++) {
highest_time_delay_card[i]=-1;
highest_time_delay[i]=-1000;
}
printf("Nulling arrays\n");
for(c=0;c<MAX_CARDS;c++) {
active[c]=0;
freq[c]=NULL;
num_freqs[c]=0;
for(i=0;i<MAX_FREQS;i++) {
phase[i][c]=NULL;
pwr_mag[i][c]=NULL;
timedelay1[i][c]=NULL;
timedelay2[i][c]=NULL;
}
}
for(c=CARD;c<=CARD;c++) {
sprintf(filename1,"/tmp/phasing_cal_%s_%d.dat",radar_name1,c);
calfile1=fopen(filename1,"r");
printf("1: %p %s\n",calfile1,filename1);
if (calfile1!=NULL ) {
fread(&num_phasecodes[c],sizeof(int),1,calfile1);
fread(&num_cards[c],sizeof(int),1,calfile1);
fread(&num_freqs[c],sizeof(int),1,calfile1);
if (num_freqs[c]>MAX_FREQS) {
printf("Too many stored frequencies...up the MAX_FREQS define!\n");
exit(0);
}
printf("Allocating arrays\n");
for(i=0;i<num_freqs[c];i++) {
if (freq[c]!=NULL) free(freq[c]);
freq[c]=calloc(num_freqs[c],sizeof(double));
if (phase[i][c]!=NULL) free(phase[i][c]);
phase[i][c]=calloc(num_phasecodes[c],sizeof(double));
if (pwr_mag[i][c]!=NULL) free(pwr_mag[i][c]);
pwr_mag[i][c]=calloc(num_phasecodes[c],sizeof(double));
if (timedelay1[i][c]!=NULL) free(timedelay1[i][c]);
timedelay1[i][c]=calloc(num_phasecodes[c],sizeof(double));
}
printf("Reading frequency array\n");
count=fread(freq[c],sizeof(double),num_freqs[c],calfile1);
count=1;
printf("Reading in data\n");
while(count>0) {
count=fread(&ii,sizeof(int),1,calfile1);
if (count==0) {
break;
}
count=fread(phase[ii][c],sizeof(double),num_phasecodes[c],calfile1);
if (verbose > 1) printf("Freq index: %d Phase Count: %d\n",ii,count);
count=fread(pwr_mag[ii][c],sizeof(double),num_phasecodes[c],calfile1);
if (verbose > 1) printf("Freq index: %d Pwr-mag Count: %d\n",ii,count);
if (count==0) {
break;
}
}
if (count==0) {
if (feof(calfile1)) printf("End of File!\n");
}
fclose(calfile1);
printf("Processing Phase Information for Radar: %s Card: %d\n",radar_name1,c);
for (p=0;p<num_phasecodes[c];p++) {
// printf("Phase Code: %d\n",p);
best_offset[p]=1000;
best_sumsq[p]=1E100;
for (o=-20;o<20;o++) {
offset=360.0*o;
max_Y=-1000;
for (i=0;i<num_freqs[c];i++) {
Y[i]=phase[i][c][p]+offset;
if (Y[i]> max_Y) max_Y=Y[i];
}
/*
* Linear Regression Y=slope*freq
*/
gsl_fit_mul (freq[c], 1, Y, 1, num_freqs[c], &slope, &slope_variance, &sumsq);
if (max_Y < 0 ) {
if (sumsq < best_sumsq[p]) {
best_offset[p]=offset;
best_sumsq[p]=sumsq;
best_var[p]=slope_variance;
best_slope[p]=slope;
}
}
} // end offset loop
printf("%d :: Best Offset: %lf Phase0: %lf\n",p,best_offset[p],phase[0][c][p]);
/*
* Build the timedelays arrays using the best phase offset from the linear regression
*/
for (i=0;i<num_freqs[c];i++) {
time0[i]=phase_to_timedelay(phase[i][c][0]+best_offset[0],freq[c][i]);
timedelay1[i][c][p]=phase_to_timedelay(phase[i][c][p]+best_offset[p],freq[c][i]);
if((phase[i][c][p]+best_offset[p]) > 0 ) {
printf("ERROR: Phase error: %d %d %d %lfi %lf\n",i,c,p,phase[i][c][p],best_offset[p]);
exit(0);
}
// printf("Phase: %d :: Freq %e :: Time Delay %% Diff %lf\n",
// p,freq[c][i],fabs((timedelay[i][c][p]-expected_timedelay(p)-time0[i])/(expected_timedelay(p)+time0[i]))*100);
} //freq loop
if(timedelay1[0][c][p] < minimum_timedelay) {
printf("ERROR: Timedelay1 switch error: %d %lf\n",p,timedelay1[0][c][p]);
exit(0);
}
if(pwr_mag[0][c][p] < pwr_threshold) {
printf("ERROR: pwr_mag switch error: %d\n",p);
exit(0);
}
} //phasecode loop
} // end calfile1 check
sprintf(filename2,"/tmp/phasing_cal_%s_%d.dat",radar_name2,c);
calfile2=fopen(filename2,"r");
printf("1: %p %s\n",calfile2,filename2);
if (calfile2!=NULL ) {
fread(&num_phasecodes[c],sizeof(int),1,calfile2);
fread(&num_cards[c],sizeof(int),1,calfile2);
fread(&num_freqs[c],sizeof(int),1,calfile2);
if (num_freqs[c]>MAX_FREQS) {
printf("Too many stored frequencies...up the MAX_FREQS define!\n");
exit(0);
}
printf("Allocating arrays\n");
for(i=0;i<num_freqs[c];i++) {
if (freq[c]!=NULL) free(freq[c]);
freq[c]=calloc(num_freqs[c],sizeof(double));
if (phase[i][c]!=NULL) free(phase[i][c]);
phase[i][c]=calloc(num_phasecodes[c],sizeof(double));
if (pwr_mag[i][c]!=NULL) free(pwr_mag[i][c]);
pwr_mag[i][c]=calloc(num_phasecodes[c],sizeof(double));
if (timedelay2[i][c]!=NULL) free(timedelay2[i][c]);
timedelay2[i][c]=calloc(num_phasecodes[c],sizeof(double));
}
printf("Reading frequency array\n");
count=fread(freq[c],sizeof(double),num_freqs[c],calfile2);
count=1;
printf("Reading in data\n");
while(count>0) {
count=fread(&ii,sizeof(int),1,calfile2);
if (count==0) {
break;
}
count=fread(phase[ii][c],sizeof(double),num_phasecodes[c],calfile2);
if (verbose > 1) printf("Freq index: %d Phase Count: %d\n",ii,count);
count=fread(pwr_mag[ii][c],sizeof(double),num_phasecodes[c],calfile2);
if (verbose > 1) printf("Freq index: %d Pwr-mag Count: %d\n",ii,count);
if (count==0) {
break;
}
}
if (count==0) {
if (feof(calfile2)) printf("End of File!\n");
}
fclose(calfile2);
printf("Processing Phase Information for Radar: %s Card: %d\n",radar_name2,c);
for (p=0;p<num_phasecodes[c];p++) {
// printf("Phase Code: %d\n",p);
best_offset[p]=1000;
best_sumsq[p]=1E100;
for (o=-20;o<20;o++) {
offset=360.0*o;
max_Y=-1000;
for (i=0;i<num_freqs[c];i++) {
Y[i]=phase[i][c][p]+offset;
if (Y[i]> max_Y) max_Y=Y[i];
}
/*
* Linear Regression Y=slope*freq
*/
gsl_fit_mul (freq[c], 1, Y, 1, num_freqs[c], &slope, &slope_variance, &sumsq);
if (max_Y < 0 ) {
if (sumsq < best_sumsq[p]) {
best_offset[p]=offset;
best_sumsq[p]=sumsq;
best_var[p]=slope_variance;
best_slope[p]=slope;
}
}
} // end offset loop
printf("%d :: Best Offset: %lf Phase0: %lf\n",p,best_offset[p],phase[0][c][p]);
/*
* Build the timedelays arrays using the best phase offset from the linear regression
*/
for (i=0;i<num_freqs[c];i++) {
time0[i]=phase_to_timedelay(phase[i][c][0]+best_offset[0],freq[c][i]);
timedelay2[i][c][p]=phase_to_timedelay(phase[i][c][p]+best_offset[p],freq[c][i]);
// printf("Phase: %d :: Freq %e :: Time Delay %% Diff %lf\n",
// p,freq[c][i],fabs((timedelay[i][c][p]-expected_timedelay(p)-time0[i])/(expected_timedelay(p)+time0[i]))*100);
} //freq loop
if(timedelay2[0][c][p] < minimum_timedelay) {
printf("ERROR: Timedelay2 switch error: %d %lf\n",p,timedelay2[0][c][p]);
exit(0);
}
if(pwr_mag[0][c][p] < pwr_threshold) {
printf("ERROR: pwr_mag switch error: %d\n",p);
exit(0);
}
} //phasecode loop
} // end calfile2 check
max_var0=-1000;
for (b=0;b<13;b++) {
max_var[b]=-1000.0;
}
for (p=0;p<num_phasecodes[c];p++) {
for (i=0;i<num_freqs[c];i++) {
diff=timedelay1[i][c][p]-timedelay2[i][c][p];
var=fabs(diff);
if (p == 0 ) {
if (var > max_var0) max_var0=var;
}
for (b=0;b<13;b++) {
hmm=pow(2,b);
if( p == hmm ) {
if (var > max_var[b]) max_var[b]=var;
}
}
}
}
printf("Code: %d Max Diff (ns): %lf\n",0,max_var0);
for (b=0;b<13;b++) {
printf("Code: %d Max Diff (ns): %lf\n",(int)pow(2,b),max_var[b]);
}
} // End card Loop
} // end of main
int
main (void)
{
double x[1000], y[1000], w[1000];
size_t xstride = 2, wstride = 3, ystride = 5;
size_t i;
for (i = 0; i < norris_n; i++)
{
x[i*xstride] = norris_x[i];
w[i*wstride] = 1.0;
y[i*ystride] = norris_y[i];
}
gsl_ieee_env_setup();
{
double c0, c1, cov00, cov01, cov11, sumsq;
double expected_c0 = -0.262323073774029;
double expected_c1 = 1.00211681802045;
double expected_cov00 = pow(0.232818234301152, 2.0);
double expected_cov01 = -7.74327536339570e-05; /* computed from octave */
double expected_cov11 = pow(0.429796848199937E-03, 2.0);
double expected_sumsq = 26.6173985294224;
gsl_fit_linear (x, xstride, y, ystride, norris_n,
&c0, &c1, &cov00, &cov01, &cov11, &sumsq);
/* gsl_fit_wlinear (x, xstride, w, wstride, y, ystride, norris_n,
&c0, &c1, &cov00, &cov01, &cov11, &sumsq); */
gsl_test_rel (c0, expected_c0, 1e-10, "norris gsl_fit_linear c0") ;
gsl_test_rel (c1, expected_c1, 1e-10, "norris gsl_fit_linear c1") ;
gsl_test_rel (cov00, expected_cov00, 1e-10, "norris gsl_fit_linear cov00") ;
gsl_test_rel (cov01, expected_cov01, 1e-10, "norris gsl_fit_linear cov01") ;
gsl_test_rel (cov11, expected_cov11, 1e-10, "norris gsl_fit_linear cov11") ;
gsl_test_rel (sumsq, expected_sumsq, 1e-10, "norris gsl_fit_linear sumsq") ;
}
{
double c0, c1, cov00, cov01, cov11, sumsq;
double expected_c0 = -0.262323073774029;
double expected_c1 = 1.00211681802045;
double expected_cov00 = 6.92384428759429e-02; /* computed from octave */
double expected_cov01 = -9.89095016390515e-05; /* computed from octave */
double expected_cov11 = 2.35960747164148e-07; /* computed from octave */
double expected_sumsq = 26.6173985294224;
gsl_fit_wlinear (x, xstride, w, wstride, y, ystride, norris_n,
&c0, &c1, &cov00, &cov01, &cov11, &sumsq);
gsl_test_rel (c0, expected_c0, 1e-10, "norris gsl_fit_wlinear c0") ;
gsl_test_rel (c1, expected_c1, 1e-10, "norris gsl_fit_wlinear c1") ;
gsl_test_rel (cov00, expected_cov00, 1e-10, "norris gsl_fit_wlinear cov00") ;
gsl_test_rel (cov01, expected_cov01, 1e-10, "norris gsl_fit_wlinear cov01") ;
gsl_test_rel (cov11, expected_cov11, 1e-10, "norris gsl_fit_wlinear cov11") ;
gsl_test_rel (sumsq, expected_sumsq, 1e-10, "norris gsl_fit_wlinear sumsq") ;
}
for (i = 0; i < noint1_n; i++)
{
x[i*xstride] = noint1_x[i];
w[i*wstride] = 1.0;
y[i*ystride] = noint1_y[i];
}
{
double c1, cov11, sumsq;
double expected_c1 = 2.07438016528926;
double expected_cov11 = pow(0.165289256198347E-01, 2.0);
double expected_sumsq = 127.272727272727;
gsl_fit_mul (x, xstride, y, ystride, noint1_n, &c1, &cov11, &sumsq);
gsl_test_rel (c1, expected_c1, 1e-10, "noint1 gsl_fit_mul c1") ;
gsl_test_rel (cov11, expected_cov11, 1e-10, "noint1 gsl_fit_mul cov11") ;
gsl_test_rel (sumsq, expected_sumsq, 1e-10, "noint1 gsl_fit_mul sumsq") ;
}
{
double c1, cov11, sumsq;
double expected_c1 = 2.07438016528926;
double expected_cov11 = 2.14661371686165e-05; /* computed from octave */
double expected_sumsq = 127.272727272727;
gsl_fit_wmul (x, xstride, w, wstride, y, ystride, noint1_n, &c1, &cov11, &sumsq);
gsl_test_rel (c1, expected_c1, 1e-10, "noint1 gsl_fit_wmul c1") ;
gsl_test_rel (cov11, expected_cov11, 1e-10, "noint1 gsl_fit_wmul cov11") ;
gsl_test_rel (sumsq, expected_sumsq, 1e-10, "noint1 gsl_fit_wmul sumsq") ;
}
for (i = 0; i < noint2_n; i++)
{
x[i*xstride] = noint2_x[i];
w[i*wstride] = 1.0;
y[i*ystride] = noint2_y[i];
}
{
double c1, cov11, sumsq;
double expected_c1 = 0.727272727272727;
double expected_cov11 = pow(0.420827318078432E-01, 2.0);
double expected_sumsq = 0.272727272727273;
gsl_fit_mul (x, xstride, y, ystride, noint2_n, &c1, &cov11, &sumsq);
gsl_test_rel (c1, expected_c1, 1e-10, "noint2 gsl_fit_mul c1") ;
gsl_test_rel (cov11, expected_cov11, 1e-10, "noint2 gsl_fit_mul cov11") ;
gsl_test_rel (sumsq, expected_sumsq, 1e-10, "noint2 gsl_fit_mul sumsq") ;
}
{
double c1, cov11, sumsq;
double expected_c1 = 0.727272727272727;
double expected_cov11 = 1.29870129870130e-02 ; /* computed from octave */
double expected_sumsq = 0.272727272727273;
gsl_fit_wmul (x, xstride, w, wstride, y, ystride, noint2_n, &c1, &cov11, &sumsq);
gsl_test_rel (c1, expected_c1, 1e-10, "noint2 gsl_fit_wmul c1") ;
gsl_test_rel (cov11, expected_cov11, 1e-10, "noint2 gsl_fit_wmul cov11") ;
gsl_test_rel (sumsq, expected_sumsq, 1e-10, "noint2 gsl_fit_wmul sumsq") ;
}
/* now summarize the results */
exit (gsl_test_summary ());
}