NAG Library Manual, Mark 28.6
```/* nag_contab_tabulate_stat (g11bac) Example Program.
*
* Copyright 2022 Numerical Algorithms Group.
*
* Mark 28.6, 2022.
*/

#include <nag.h>
#include <stdio.h>

int main(void) {
Integer exit_status = 0, i, items, j, k, ltmax, maxt, n, ncells;
Integer ncol, ndim, nfac, nrow, tdf;
Integer *count = 0, *factor = 0, *idim = 0, *isf = 0, *lfac = 0;
double *comm_ar = 0, *table = 0, *wt = 0, *y = 0;
char nag_enum_arg[40];
Nag_TableStats stat;
Nag_Weightstype weight;
NagError fail;

#define FACTOR(I, J) factor[((I)-1) * nfac + (J)-1]

INIT_FAIL(fail);

printf("nag_contab_tabulate_stat (g11bac) Example Program Results\n");

/* Skip heading in data file */
scanf("%*[^\n]");
scanf("%39s", nag_enum_arg);
/* nag_enum_name_to_value (x04nac).
* Converts NAG enum member name to value
*/
stat = (Nag_TableStats)nag_enum_name_to_value(nag_enum_arg);
scanf("%39s", nag_enum_arg);
weight = (Nag_Weightstype)nag_enum_name_to_value(nag_enum_arg);
scanf("%" NAG_IFMT " %" NAG_IFMT " ", &n, &nfac);

ltmax = 18;
maxt = ltmax;
if (!(isf = NAG_ALLOC(nfac, Integer)) || !(lfac = NAG_ALLOC(nfac, Integer)) ||
!(idim = NAG_ALLOC(nfac, Integer)) ||
!(factor = NAG_ALLOC(n * nfac, Integer)) ||
!(count = NAG_ALLOC(maxt, Integer)) || !(y = NAG_ALLOC(n, double)) ||
!(wt = NAG_ALLOC(n, double)) || !(table = NAG_ALLOC(maxt, double)) ||
!(comm_ar = NAG_ALLOC(2 * maxt, double))) {
printf("Allocation failure\n");
exit_status = -1;
goto END;
}

if (weight == Nag_Weights || weight == Nag_Weightsvar) {
for (i = 1; i <= n; ++i) {
for (j = 1; j <= nfac; ++j)
scanf("%" NAG_IFMT "", &FACTOR(i, j));
scanf("%lf %lf", &y[i - 1], &wt[i - 1]);
}
} else {
for (i = 1; i <= n; ++i) {
for (j = 1; j <= nfac; ++j)
scanf("%" NAG_IFMT "", &FACTOR(i, j));
scanf("%lf", &y[i - 1]);
}
}
for (j = 1; j <= nfac; ++j)
scanf("%" NAG_IFMT "", &lfac[j - 1]);
for (j = 1; j <= nfac; ++j)
scanf("%" NAG_IFMT "", &isf[j - 1]);
tdf = 3;
maxt = ltmax;

/* nag_contab_tabulate_stat (g11bac).
* Computes multiway table from set of classification
* factors using selected statistic
*/
nag_contab_tabulate_stat(stat, Nag_TableUpdateI, weight, n, nfac, isf, lfac,
factor, tdf, y, wt, table, maxt, &ncells, &ndim,
idim, count, comm_ar, &fail);
if (fail.code != NE_NOERROR) {
printf("Error from nag_contab_tabulate_stat (g11bac).\n%s\n", fail.message);
exit_status = 1;
goto END;
}
printf("\n");
printf("%s\n", "Table");
printf("\n");
ncol = idim[ndim - 1];
nrow = ncells / ncol;
k = 1;
for (i = 1; i <= nrow; ++i) {
for (j = k, items = 1; j <= k + ncol - 1; ++j, items++)
printf("%8.2f(%2" NAG_IFMT ")%s", table[j - 1], count[j - 1],
items % 6 ? "" : "\n");
k += ncol;
}

END:
NAG_FREE(isf);
NAG_FREE(lfac);
NAG_FREE(idim);
NAG_FREE(factor);
NAG_FREE(count);
NAG_FREE(y);
NAG_FREE(wt);
NAG_FREE(table);
NAG_FREE(comm_ar);

return exit_status;
}
```