GRASS Programmer's Manual  6.5.svn(2014)-r66266
weisberg.c
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1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <math.h>
4 #include "local_proto.h"
5
6
7 double *weisberg_bingham(double *x, int n)
8 {
9  static double y[2];
10  double suma = 0.0, sumb = 0.0, sumc = 0.0, sumd = 0.0, z, *xcopy;
11  int i;
12
13  if ((xcopy = (double *)malloc(n * sizeof(double))) == NULL) {
14  fprintf(stderr, "Memory error in shapiro_francia\n");
15  exit(EXIT_FAILURE);
16  }
17
18  for (i = 0; i < n; ++i)
19  xcopy[i] = x[i];
20
21  qsort(xcopy, n, sizeof(double), dcmp);
22
23  for (i = 0; i < n; ++i) {
24  z = xinormal((i + 1 - 0.375) / (n + 0.25));
25  suma += z * xcopy[i];
26  sumb += z * z;
27  sumc += xcopy[i];
28  sumd += xcopy[i] * xcopy[i];
29  }
30
31  y[0] = suma * suma / sumb / (sumd - sumc * sumc / n);
32
33 #ifdef NOISY
34  fprintf(stdout, " TEST14 SF(N) =%10.4f\n", y[0]);
35 #endif /* NOISY */
36
37  free(xcopy);
38
39  return y;
40 } /* test14_ */
int dcmp(const void *i, const void *j)
Definition: dcmp.c:1
int y
Definition: plot.c:34
void * malloc(YYSIZE_T)
return NULL
Definition: dbfopen.c:1394
void free(void *)
double xinormal(double)
Definition: xinormal.c:5
double * weisberg_bingham(double *x, int n)
Definition: weisberg.c:7
int n