/* nag_ztgexc (f08ytc) Example Program. * * Copyright 2011 Numerical Algorithms Group. * * Mark 23, 2011. */ #include #include #include #include #include int main(void) { /* Scalars */ Integer i, ifst, ilst, j, n, pdq, pds, pdt, pdz; Integer exit_status = 0; /* Arrays */ Complex *q = 0, *s = 0, *t = 0, *z = 0; char nag_enum_arg[40]; NagError fail; Nag_OrderType order; Nag_Boolean wantq, wantz; Nag_MatrixType upmat = Nag_UpperMatrix; Nag_DiagType diag = Nag_NonUnitDiag; Nag_LabelType intlab = Nag_IntegerLabels; Nag_ComplexFormType brac = Nag_BracketForm; #ifdef NAG_COLUMN_MAJOR #define S(I, J) s[(J-1)*pds + I - 1] #define T(I, J) t[(J-1)*pdt + I - 1] order = Nag_ColMajor; #else #define S(I, J) s[(I-1)*pds + J - 1] #define T(I, J) t[(I-1)*pdt + J - 1] order = Nag_RowMajor; #endif INIT_FAIL(fail); printf("nag_ztgexc (f08ytc) Example Program Results\n\n"); /* Skip heading in data file */ scanf("%*[^\n]"); scanf("%ld%*[^\n]", &n); if (n < 0) { printf("Invalid n\n"); exit_status = 1; goto END; } scanf(" %39s%*[^\n]", nag_enum_arg); /* nag_enum_name_to_value (x04nac). * Converts NAG enum member name to value */ wantq = (Nag_Boolean) nag_enum_name_to_value(nag_enum_arg); scanf(" %39s%*[^\n]", nag_enum_arg); wantz = (Nag_Boolean) nag_enum_name_to_value(nag_enum_arg); pds = n; pdt = n; pdq = (wantq?n:1); pdz = (wantz?n:1); /* Allocate memory */ if ( !(s = NAG_ALLOC(n*n, Complex)) || !(t = NAG_ALLOC(n*n, Complex)) || !(q = NAG_ALLOC(pdq*pdq, Complex)) || !(z = NAG_ALLOC(pdz*pdz, Complex))) { printf("Allocation failure\n"); exit_status = -1; goto END; } /* Read S and T from data file */ for (i = 1; i <= n; ++i) for (j = 1; j <= n; ++j) scanf(" ( %lf , %lf )", &S(i, j).re, &S(i, j).im); scanf("%*[^\n]"); for (i = 1; i <= n; ++i) for (j = 1; j <= n; ++j) scanf(" ( %lf , %lf )", &T(i, j).re, &T(i, j).im); scanf("%*[^\n]"); /* Read the row indices */ scanf("%ld%ld%*[^\n]", &ifst, &ilst); /* Reorder the S and T */ nag_ztgexc(order, wantq, wantz, n, s, pds, t, pdt, q, pdq, z, pdz, ifst, &ilst, &fail); if (fail.code != NE_NOERROR) { printf("Error from nag_ztgexc (f08ytc).\n%s\n", fail.message); exit_status = 1; goto END; } /* Print reordered generalized Schur form */ fflush(stdout); nag_gen_complx_mat_print_comp(order, upmat, diag, n, n, s, pds, brac, "%7.4f", "Reordered Schur matrix S", intlab, NULL, intlab, NULL, 80, 0, NULL, &fail); if (fail.code != NE_NOERROR) goto PRERR; printf("\n"); fflush(stdout); nag_gen_complx_mat_print_comp(order, upmat, diag, n, n, t, pdt, brac, "%7.4f", "Reordered Schur matrix T", intlab, NULL, intlab, NULL, 80, 0, NULL, &fail); PRERR: if (fail.code != NE_NOERROR) { printf("Error from nag_gen_complx_mat_print_comp (x04dbc).\n%s\n", fail.message); exit_status = 1; } END: NAG_FREE(q); NAG_FREE(s); NAG_FREE(t); NAG_FREE(z); return exit_status; }