GRASS GIS 8 Programmer's Manual 8.4.1(2025)-45ca3179ab
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andrsnde.c
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1#include <stdio.h>
2#include <stdlib.h>
3#include <math.h>
4#include "local_proto.h"
5
6double *Cdhc_anderson_darling_exp(double *x, int n)
7{
8 static double y[2];
9 double mean = 0.0, *xcopy, fx, sum3 = 0.0;
10 int i;
11
12 if ((xcopy = (double *)malloc(n * sizeof(double))) == NULL) {
13 fprintf(stderr, "Memory error in Cdhc_anderson_darling\n");
14 exit(EXIT_FAILURE);
15 }
16
17 for (i = 0; i < n; ++i) {
18 xcopy[i] = x[i];
19 mean += x[i];
20 }
21 mean /= n;
22 qsort(xcopy, n, sizeof(double), Cdhc_dcmp);
23
24 for (i = 0; i < n; ++i) {
25 fx = 1 - exp(-xcopy[i] / mean);
26 sum3 += (2.0 * i + 1) * (log(fx) - xcopy[n - i - 1] / mean);
27 }
28
29 y[0] = (1.0 + 0.3 / n) * (-n - sum3 / n);
30#ifdef NOISY
31 fprintf(stdout, " TEST20 AD(E) =%10.4f\n", y[0]);
32#endif /* NOISY */
33
34 free(xcopy);
35
36 return y;
37}
double * Cdhc_anderson_darling_exp(double *x, int n)
Definition andrsnde.c:6
#define NULL
Definition ccmath.h:32
int Cdhc_dcmp(const void *i, const void *j)
Definition dcmp.c:1
#define x