```/* nag_tsa_transf_prelim_fit (g13bdc) Example Program.
*
* Copyright 2014 Numerical Algorithms Group.
*
* Mark 7, 2001.
*/

#include <stdio.h>
#include <nag.h>
#include <nag_stdlib.h>
#include <nagg13.h>

int main(void)
{
/* Scalars */
double          r0, s;
Integer         exit_status, i, iwa, nl, nwds;

/* Arrays */
double          *r = 0, *wa = 0, *wds = 0;
Integer         isf[3];
Nag_TransfOrder transfv;
NagError        fail;

INIT_FAIL(fail);

exit_status = 0;

printf(
"nag_tsa_transf_prelim_fit (g13bdc) Example Program Results\n");

/* Skip heading in data file */
scanf("%*[^\n] ");
scanf("%ld%*[^\n] ", &nl);
scanf("%lf%*[^\n] ", &r0);

if (nl > 0)
{
/* Allocate array r */
if (!(r = NAG_ALLOC(nl, double)))
{
printf("Allocation failure\n");
exit_status = -1;
goto END;
}

for (i = 1; i <= nl; ++i)
scanf("%lf", &r[i-1]);
scanf("%*[^\n] ");
scanf("%ld %ld %ld", &transfv.nag_b, &transfv.nag_q,
&transfv.nag_p);
scanf("%lf%*[^\n] ", &s);

nwds = transfv.nag_q + transfv.nag_p + 1;
iwa = transfv.nag_p * (transfv.nag_p + 1);

/* Allocate arrays wa and wds */
if (!(wa = NAG_ALLOC(iwa, double)) ||
!(wds = NAG_ALLOC(nwds, double)))
{
printf("Allocation failure\n");
exit_status = -1;
goto END;
}

/* nag_tsa_transf_prelim_fit (g13bdc).
* Multivariate time series, preliminary estimation of
* transfer function model
*/
nag_tsa_transf_prelim_fit(r0, r, nl, &transfv, s, wds, isf, &fail);
if (fail.code != NE_NOERROR)
{
printf(
"Error from nag_tsa_transf_prelim_fit (g13bdc).\n%s\n",
fail.message);
exit_status = 1;
goto END;
}

printf("\n");
printf("Success/failure indicator%4ld%4ld\n",
isf[0], isf[1]);
printf("\n");
printf("Transfer function model B, Q, P =");

printf("%4ld %4ld %4ld\n", transfv.nag_b, transfv.nag_q,
transfv.nag_p);

printf("\n");
printf("Parameter initial estimates\n");

for (i = 1; i <= nwds; ++i)
printf("%10.4f", wds[i-1]);
printf("\n");
}

END:
NAG_FREE(r);
NAG_FREE(wa);
NAG_FREE(wds);

return exit_status;
}
```