/* Driver for routine tutest */

#include <stdio.h>
#include <math.h>
#define NRANSI
#include "nr.h"
#include "nrutil.h"

#define NPTS 5000
#define MPTS 1000
#define EPS 0.02
#define VAR1 1.0
#define VAR2 4.0
#define NSHFT 10

int main(void)
{
	long idum=(-51773);
	int i,j;
	float fctr1,fctr2,prob,t,*data1,*data2;

	data1=vector(1,NPTS);
	data2=vector(1,MPTS);
	/* Generate two gaussian distributions of different variance */
	fctr1=sqrt(VAR1);
	for (i=1;i<=NPTS;i++) data1[i]=fctr1*gasdev(&idum);
	fctr2=sqrt(VAR2);
	for (i=1;i<=MPTS;i++)
		data2[i]=NSHFT/2.0*EPS+fctr2*gasdev(&idum);
	printf("\nDistribution #1 : variance = %6.2f\n",VAR1);
	printf("Distribution #2 : variance = %6.2f\n\n",VAR2);
	printf("%7s %8s %16s\n","shift","t","probability");
	for (i=1;i<=NSHFT+1;i++) {
		tutest(data1,NPTS,data2,MPTS,&t,&prob);
		printf("%6.2f %10.2f %11.2f\n",(i-1)*EPS,t,prob);
		for (j=1;j<=NPTS;j++) data1[j] += EPS;
	}
	free_vector(data2,1,MPTS);
	free_vector(data1,1,NPTS);
	return 0;
}
#undef NRANSI