Esempio n. 1
0
main()
{
   /* test program for above utility routines */

   double **a, **b, **c, **bT;
   double *x, *y, *z;
   FILE *infile, *outfile;
   int a_rows, a_cols, b_rows, b_cols, errors, xn, yn;

   infile = fopen("mat.in", "r");
   outfile = fopen("mat.dat", "w");

   a = dReadMatrix( infile, &a_rows, &a_cols, &errors);
   b = dReadMatrix( infile, &b_rows, &b_cols, &errors);
   x = dReadVector( infile, &xn, &errors);
   y = dReadVector( infile, &yn, &errors);
   getchar();

   dmdump( stdout, "Matrix A", a, a_rows, a_cols, "%8.2lf");
   dmdump( stdout, "Matrix B", b, b_rows, b_cols, "%8.2lf");
   dvdump( stdout, "Vector x", x, xn, "%8.2lf");
   dvdump( stdout, "Vector y", y, yn, "%8.2lf");
   z = dvector( 1, xn );
   dvadd( x, xn, y, z );
   dvdump( stdout, "x + y", z, xn, "%8.2lf");
   dvsub( x, xn, y, z );
   dvdump( stdout, "x - y", z, xn, "%8.2lf");
   dvsmy( x, xn, 2.0, z );
   dvdump( stdout, "2x", z, xn, "%8.2lf");
   printf("Magnitude of 2x: %7.2lf\n", dvmag( z, xn ));
   printf("dot product x.y: %7.2lf\n", dvdot( x, xn, y));

   dmvmult( a, a_rows, a_cols, x, xn, z );
   dvdump( stdout, "Ax", z, xn, "%8.2lf");

   c = dmatrix( 1, a_rows, 1, b_cols );    
   bT = dmatrix( 1, b_cols, 1, b_rows );
   dmtranspose( b, b_rows, b_cols, bT);
   dmdump( stdout, "Matrix B (transposed)", bT, b_cols, b_rows, "%8.2lf");
   dmmult( a, a_rows, a_cols, bT, b_cols, b_rows, c);
   dmdump( stdout, "Matrix AB", c, a_rows, b_rows, "%8.2lf");

   /*  dmfillUT( a, a_rows, a_cols );
       dmdump( stdout, "Symmetrified matrix A", a, a_rows, a_cols, "%8.2lf"); */

   free_dmatrix( a, 1, a_rows, 1, a_cols);
   free_dmatrix( b, 1, b_rows, 1, b_cols);
   free_dmatrix( c, 1, a_rows, 1, b_cols);
   free_dvector( x, 1, xn );
   free_dvector( y, 1, yn );
}
Esempio n. 2
0
void
dreadhb(int *nrow, int *ncol, int *nonz,
	double **nzval, int **rowind, int **colptr)
{
/*
 * Purpose
 * =======
 * 
 * Read a DOUBLE PRECISION matrix stored in Harwell-Boeing format 
 * as described below.
 * 
 * Line 1 (A72,A8) 
 *  	Col. 1 - 72   Title (TITLE) 
 *	Col. 73 - 80  Key (KEY) 
 * 
 * Line 2 (5I14) 
 * 	Col. 1 - 14   Total number of lines excluding header (TOTCRD) 
 * 	Col. 15 - 28  Number of lines for pointers (PTRCRD) 
 * 	Col. 29 - 42  Number of lines for row (or variable) indices (INDCRD) 
 * 	Col. 43 - 56  Number of lines for numerical values (VALCRD) 
 *	Col. 57 - 70  Number of lines for right-hand sides (RHSCRD) 
 *                    (including starting guesses and solution vectors 
 *		       if present) 
 *           	      (zero indicates no right-hand side data is present) 
 *
 * Line 3 (A3, 11X, 4I14) 
 *   	Col. 1 - 3    Matrix type (see below) (MXTYPE) 
 * 	Col. 15 - 28  Number of rows (or variables) (NROW) 
 * 	Col. 29 - 42  Number of columns (or elements) (NCOL) 
 *	Col. 43 - 56  Number of row (or variable) indices (NNZERO) 
 *	              (equal to number of entries for assembled matrices) 
 * 	Col. 57 - 70  Number of elemental matrix entries (NELTVL) 
 *	              (zero in the case of assembled matrices) 
 * Line 4 (2A16, 2A20) 
 * 	Col. 1 - 16   Format for pointers (PTRFMT) 
 *	Col. 17 - 32  Format for row (or variable) indices (INDFMT) 
 *	Col. 33 - 52  Format for numerical values of coefficient matrix (VALFMT) 
 * 	Col. 53 - 72 Format for numerical values of right-hand sides (RHSFMT) 
 *
 * Line 5 (A3, 11X, 2I14) Only present if there are right-hand sides present 
 *    	Col. 1 	      Right-hand side type: 
 *	         	  F for full storage or M for same format as matrix 
 *    	Col. 2        G if a starting vector(s) (Guess) is supplied. (RHSTYP) 
 *    	Col. 3        X if an exact solution vector(s) is supplied. 
 *	Col. 15 - 28  Number of right-hand sides (NRHS) 
 *	Col. 29 - 42  Number of row indices (NRHSIX) 
 *          	      (ignored in case of unassembled matrices) 
 *
 * The three character type field on line 3 describes the matrix type. 
 * The following table lists the permitted values for each of the three 
 * characters. As an example of the type field, RSA denotes that the matrix 
 * is real, symmetric, and assembled. 
 *
 * First Character: 
 *	R Real matrix 
 *	C Complex matrix 
 *	P Pattern only (no numerical values supplied) 
 *
 * Second Character: 
 *	S Symmetric 
 *	U Unsymmetric 
 *	H Hermitian 
 *	Z Skew symmetric 
 *	R Rectangular 
 *
 * Third Character: 
 *	A Assembled 
 *	E Elemental matrices (unassembled) 
 *
 */

    register int i, numer_lines, rhscrd = 0;
    int tmp, colnum, colsize, rownum, rowsize, valnum, valsize;
    char buf[100], type[4], key[10];
    FILE *fp;

    fp = stdin;

    /* Line 1 */
    fscanf(fp, "%72c", buf); buf[72] = 0;
    printf("Title: %s", buf);
    fscanf(fp, "%8c", key);  key[8] = 0;
    printf("Key: %s\n", key);
    dDumpLine(fp);

    /* Line 2 */
    for (i=0; i<5; i++) {
	fscanf(fp, "%14c", buf); buf[14] = 0;
	sscanf(buf, "%d", &tmp);
	if (i == 3) numer_lines = tmp;
	if (i == 4 && tmp) rhscrd = tmp;
    }
    dDumpLine(fp);

    /* Line 3 */
    fscanf(fp, "%3c", type);
    fscanf(fp, "%11c", buf); /* pad */
    type[3] = 0;
#ifdef DEBUG
    printf("Matrix type %s\n", type);
#endif
    
    fscanf(fp, "%14c", buf); sscanf(buf, "%d", nrow);
    fscanf(fp, "%14c", buf); sscanf(buf, "%d", ncol);
    fscanf(fp, "%14c", buf); sscanf(buf, "%d", nonz);
    fscanf(fp, "%14c", buf); sscanf(buf, "%d", &tmp);
    
    if (tmp != 0)
	  printf("This is not an assembled matrix!\n");
    if (*nrow != *ncol)
	printf("Matrix is not square.\n");
    dDumpLine(fp);

    /* Allocate storage for the three arrays ( nzval, rowind, colptr ) */
    dallocateA(*ncol, *nonz, nzval, rowind, colptr);

    /* Line 4: format statement */
    fscanf(fp, "%16c", buf);
    dParseIntFormat(buf, &colnum, &colsize);
    fscanf(fp, "%16c", buf);
    dParseIntFormat(buf, &rownum, &rowsize);
    fscanf(fp, "%20c", buf);
    dParseFloatFormat(buf, &valnum, &valsize);
    fscanf(fp, "%20c", buf);
    dDumpLine(fp);

    /* Line 5: right-hand side */    
    if ( rhscrd ) dDumpLine(fp); /* skip RHSFMT */
    
#ifdef DEBUG
    printf("%d rows, %d nonzeros\n", *nrow, *nonz);
    printf("colnum %d, colsize %d\n", colnum, colsize);
    printf("rownum %d, rowsize %d\n", rownum, rowsize);
    printf("valnum %d, valsize %d\n", valnum, valsize);
#endif
    
    dReadVector(fp, *ncol+1, *colptr, colnum, colsize);
    dReadVector(fp, *nonz, *rowind, rownum, rowsize);
    if ( numer_lines ) {
        dReadValues(fp, *nonz, *nzval, valnum, valsize);
    }
    
    fclose(fp);

}