/* nag_surviv_kaplanmeier (g12aac) Example Program.
*
* Copyright 2024 Numerical Algorithms Group.
*
* Mark 30.0, 2024.
*
*/
#include <nag.h>
#include <stdio.h>
int main(void) {
Integer exit_status = 0, i, *ic = 0, *ifreq = 0, n, nd;
NagError fail;
double *p = 0, *psig = 0, *t = 0, *tp = 0;
INIT_FAIL(fail);
printf("nag_surviv_kaplanmeier (g12aac) Example Program Results\n");
/* Skip heading in data file */
scanf("%*[^\n] ");
scanf("%" NAG_IFMT " ", &n);
if (n >= 2) {
if (!(psig = NAG_ALLOC(n, double)) || !(p = NAG_ALLOC(n, double)) ||
!(t = NAG_ALLOC(n, double)) || !(tp = NAG_ALLOC(n, double)) ||
!(ifreq = NAG_ALLOC(n, Integer)) || !(ic = NAG_ALLOC(n, Integer))) {
printf("Allocation failure\n");
exit_status = -1;
goto END;
}
} else {
printf("Invalid n.\n");
exit_status = 1;
return exit_status;
}
for (i = 0; i < n; ++i)
scanf("%lf %" NAG_IFMT " %" NAG_IFMT " ", &t[i], &ic[i], &ifreq[i]);
/* nag_surviv_kaplanmeier (g12aac).
* Computes Kaplan-Meier (product-limit) estimates of
* survival probabilities
*/
nag_surviv_kaplanmeier(n, t, ic, ifreq, &nd, tp, p, psig, &fail);
if (fail.code != NE_NOERROR) {
printf("Error from nag_surviv_kaplanmeier (g12aac).\n%s\n", fail.message);
exit_status = 1;
goto END;
}
printf("\n Time Survival Standard\n");
printf(" probability deviation\n\n");
for (i = 0; i < nd; ++i)
printf(" %6.1f%10.3f %10.3f\n", tp[i], p[i], psig[i]);
END:
NAG_FREE(psig);
NAG_FREE(p);
NAG_FREE(t);
NAG_FREE(tp);
NAG_FREE(ifreq);
NAG_FREE(ic);
return exit_status;
}