Category : C Source Code
Archive : RECIPEX.ZIP
Filename : XMRQCOF.C
Output of file : XMRQCOF.C contained in archive : RECIPEX.ZIP
#include
#include
#include "nr.h"
#include "nrutil.h"
#define NPT 100
#define MA 6
#define SPREAD 0.1
#define SQR(a) ((a)*(a))
main()
{
int i,j,idum=(-911),mfit,*lista;
float chisq,*beta,*x,*y,*sig,**covar,**alpha;
static float a[MA+1]=
{0.0,5.0,2.0,3.0,2.0,5.0,3.0};
static float gues[MA+1]=
{0.0,4.9,2.1,2.9,2.1,4.9,3.1};
lista=ivector(1,MA);
beta=vector(1,MA);
x=vector(1,NPT);
y=vector(1,NPT);
sig=vector(1,NPT);
covar=matrix(1,MA,1,MA);
alpha=matrix(1,MA,1,MA);
/* First try sum of two gaussians */
for (i=1;i<=NPT;i++) {
x[i]=0.1*i;
y[i]=0.0;
y[i] += a[1]*exp(-SQR((x[i]-a[2])/a[3]));
y[i] += a[4]*exp(-SQR((x[i]-a[5])/a[6]));
y[i] *= (1.0+SPREAD*gasdev(&idum));
sig[i]=SPREAD*y[i];
}
mfit=MA;
for (i=1;i<=mfit;i++) lista[i]=i;
for (i=1;i<=MA;i++) a[i]=gues[i];
mrqcof(x,y,sig,NPT,a,MA,lista,mfit,alpha,beta,&chisq,fgauss);
printf("\nmatrix alpha\n");
for (i=1;i<=MA;i++) {
for (j=1;j<=MA;j++) printf("%12.4f",alpha[i][j]);
printf("\n");
}
printf("vector beta\n");
for (i=1;i<=MA;i++) printf("%12.4f",beta[i]);
printf("\nchi-squared: %12.4f\n\n",chisq);
/* Next fix one line and improve the other */
for (i=1;i<=3;i++) lista[i]=i+3;
mfit=3;
for (i=1;i<=MA;i++) a[i]=gues[i];
mrqcof(x,y,sig,NPT,a,MA,lista,mfit,alpha,beta,&chisq,fgauss);
printf("matrix alpha\n");
for (i=1;i<=mfit;i++) {
for (j=1;j<=mfit;j++) printf("%12.4f",alpha[i][j]);
printf("\n");
}
printf("vector beta\n");
for (i=1;i<=mfit;i++) printf("%12.4f",beta[i]);
printf("\nchi-squared: %12.4f\n\n",chisq);
free_matrix(alpha,1,MA,1,MA);
free_matrix(covar,1,MA,1,MA);
free_vector(sig,1,NPT);
free_vector(y,1,NPT);
free_vector(x,1,NPT);
free_vector(beta,1,MA);
free_ivector(lista,1,MA);
}
Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!
This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.
But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/