/* nag_smooth_spline_estim (g10acc) Example Program. * * Copyright 2000 Numerical Algorithms Group. * * Mark 6a revised, 2001. */ #include #include #include #include int main(void) { Integer exit_status = 0, i, maxcal, n, nord; Nag_SmoothParamMethods method; Nag_Boolean weight; char nag_enum_arg[40]; double crit, df, rho, rss, tol, u; double *coeff = 0, *h = 0, *res = 0, *weights = 0, *wtptr; double *wwt = 0, *x = 0, *xord = 0, *y = 0, *yhat = 0; double *yord = 0; NagError fail; INIT_FAIL(fail); printf("nag_smooth_spline_estim (g10acc) Example Program Results\n"); /* Skip heading in data file */ scanf("%*[^\n]"); scanf("%ld", &n); if (!(x = NAG_ALLOC(n, double)) || !(y = NAG_ALLOC(n, double)) || !(weights = NAG_ALLOC(n, double)) || !(yhat = NAG_ALLOC(n, double)) || !(coeff = NAG_ALLOC((n-1)*3, double)) || !(res = NAG_ALLOC(n, double)) || !(h = NAG_ALLOC(n, double)) || !(wwt = NAG_ALLOC(n, double)) || !(yord = NAG_ALLOC(n, double)) || !(xord = NAG_ALLOC(n, double))) { printf("Allocation failure\n"); exit_status = -1; goto END; } scanf("%s", nag_enum_arg); /* nag_enum_name_to_value(x04nac). * Converts NAG enum member name to value */ method = (Nag_SmoothParamMethods) nag_enum_name_to_value(nag_enum_arg); scanf("%s", nag_enum_arg); weight = (Nag_Boolean) nag_enum_name_to_value(nag_enum_arg); if (!weight) { for (i = 1; i <= n; ++i) scanf("%lf %lf", &x[i - 1], &y[i - 1]); wtptr = 0; } else { for (i = 1; i <= n; ++i) scanf("%lf %lf %lf", &x[i - 1], &y[i - 1], &weights[i - 1]); wtptr = weights; } scanf("%lf %lf %ld %lf", &u, &tol, &maxcal, &crit); /* Sort data, removing ties and weighting accordingly */ /* nag_order_data (g10zac). * Reorder data to give ordered distinct observations */ nag_order_data(n, x, y, wtptr, &nord, xord, yord, wwt, &rss, &fail); if (fail.code != NE_NOERROR) { printf("Error from nag_order_data (g10zac).\n%s\n", fail.message); exit_status = 1; goto END; } /* Fit cubic spline */ /* nag_smooth_spline_estim (g10acc). * Fit cubic smoothing spline, smoothing parameter estimated */ nag_smooth_spline_estim(method, nord, xord, yord, wwt, yhat, coeff, &rss, &df, res, h, &crit, &rho, u, tol, maxcal, &fail); if (fail.code != NE_NOERROR) { printf("Error from nag_smooth_spline_estim (g10acc).\n%s\n", fail.message); exit_status = 1; goto END; } /* Print results */ printf("\n"); printf("%s%10.2f\n", " Residual sum of squares = ", rss); printf("%s%10.2f\n", " Degrees of freedom = ", df); printf("%s%10.2f\n", " rho = ", rho); printf("\n"); printf("\n%s%s%s\n%s%s%s\n", " Input data", " ", "Output results", " i x y ", " ", "yhat h"); for (i = 1; i <= nord; ++i) printf("%4ld %8.3f %8.3f %8.3f %8.3f\n", i, xord[i - 1], yord[i - 1], yhat[i - 1], h[i - 1]); END: if (x) NAG_FREE(x); if (y) NAG_FREE(y); if (weights) NAG_FREE(weights); if (yhat) NAG_FREE(yhat); if (coeff) NAG_FREE(coeff); if (res) NAG_FREE(res); if (h) NAG_FREE(h); if (wwt) NAG_FREE(wwt); if (yord) NAG_FREE(yord); if (xord) NAG_FREE(xord); return exit_status; }