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2025-02-Numerical/lib/nr/ansi/recipes/chsone.c
2025-09-12 18:55:25 +09:00

19 lines
413 B
C

void chsone(float bins[], float ebins[], int nbins, int knstrn, float *df,
float *chsq, float *prob)
{
float gammq(float a, float x);
void nrerror(char error_text[]);
int j;
float temp;
*df=nbins-knstrn;
*chsq=0.0;
for (j=1;j<=nbins;j++) {
if (ebins[j] <= 0.0) nrerror("Bad expected number in chsone");
temp=bins[j]-ebins[j];
*chsq += temp*temp/ebins[j];
}
*prob=gammq(0.5*(*df),0.5*(*chsq));
}