/* nag_stat_prob_students_t (g01ebc) Example Program.
*
* Copyright 2024 Numerical Algorithms Group.
*
* Mark 30.1, 2024.
*
*/
#include <nag.h>
#include <stdio.h>
int main(void) {
Integer exit_status = 0;
double df, prob, t;
int i;
static Nag_TailProbability tail[4] = {Nag_LowerTail, Nag_UpperTail,
Nag_TwoTailSignif, Nag_TwoTailConfid};
static const char *tailmess[] = {"Nag_LowerTail", "Nag_UpperTail",
"Nag_TwoTailSignif", "Nag_TwoTailConfid"};
NagError fail;
INIT_FAIL(fail);
printf("nag_stat_prob_students_t (g01ebc) Example Program Results\n\n");
/* Skip heading in data file */
scanf("%*[^\n]");
printf(" t df prob tail\n\n");
while (scanf("%lf %lf %d\n", &t, &df, &i) != EOF)
{
/* nag_stat_prob_students_t (g01ebc).
* Probabilities for Student's t-distribution
*/
prob = nag_stat_prob_students_t(tail[i], t, df, &fail);
if (fail.code != NE_NOERROR) {
printf("Error from nag_stat_prob_students_t (g01ebc).\n%s\n",
fail.message);
exit_status = 1;
goto END;
}
printf(" %6.3f%8.3f%8.4f %s\n", t, df, prob, tailmess[i]);
}
END:
return exit_status;
}