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Text File | 1994-08-04 | 27.5 KB | 1,058 lines |
-
- /**************************************************************************
- **
- ** Copyright (C) 1993 David E. Steward & Zbigniew Leyk, all rights reserved.
- **
- ** Meschach Library
- **
- ** This Meschach Library is provided "as is" without any express
- ** or implied warranty of any kind with respect to this software.
- ** In particular the authors shall not be liable for any direct,
- ** indirect, special, incidental or consequential damages arising
- ** in any way from use of the software.
- **
- ** Everyone is granted permission to copy, modify and redistribute this
- ** Meschach Library, provided:
- ** 1. All copies contain this copyright notice.
- ** 2. All modified copies shall carry a notice stating who
- ** made the last modification and the date of such modification.
- ** 3. No charge is made for this software or works derived from it.
- ** This clause shall not be construed as constraining other software
- ** distributed on the same medium as this software, nor is a
- ** distribution fee considered a charge.
- **
- ***************************************************************************/
-
- /*
- This file contains a series of tests for the Meschach matrix
- library, parts 1 and 2
- */
-
- static char rcsid[] = "$Id: torture.c,v 1.5 1994/05/18 01:53:58 des Exp $";
-
- #include <stdio.h>
- #include <math.h>
- #include "matrix2.h"
- #include "matlab.h"
-
- #define errmesg(mesg) printf("Error: %s error: line %d\n",mesg,__LINE__)
- #define notice(mesg) printf("# Testing %s...\n",mesg);
-
- static char *test_err_list[] = {
- "unknown error", /* 0 */
- "testing error messages", /* 1 */
- "unexpected end-of-file" /* 2 */
- };
-
-
- #define MAX_TEST_ERR (sizeof(test_err_list)/sizeof(char *))
-
- /* extern int malloc_chain_check(); */
- /* #define MEMCHK() if ( malloc_chain_check(0) ) \
- { printf("Error in malloc chain: \"%s\", line %d\n", \
- __FILE__, __LINE__); exit(0); } */
- #define MEMCHK()
-
- /* cmp_perm -- returns 1 if pi1 == pi2, 0 otherwise */
- int cmp_perm(pi1, pi2)
- PERM *pi1, *pi2;
- {
- int i;
-
- if ( ! pi1 || ! pi2 )
- error(E_NULL,"cmp_perm");
- if ( pi1->size != pi2->size )
- return 0;
- for ( i = 0; i < pi1->size; i++ )
- if ( pi1->pe[i] != pi2->pe[i] )
- return 0;
- return 1;
- }
-
- /* px_rand -- generates sort-of random permutation */
- PERM *px_rand(pi)
- PERM *pi;
- {
- int i, j, k;
-
- if ( ! pi )
- error(E_NULL,"px_rand");
-
- for ( i = 0; i < 3*pi->size; i++ )
- {
- j = (rand() >> 8) % pi->size;
- k = (rand() >> 8) % pi->size;
- px_transp(pi,j,k);
- }
-
- return pi;
- }
- #ifdef RISC_OS
- #define SAVE_FILE "asx521_mat"
- #else
- #define SAVE_FILE "asx5213a.mat"
- #endif
- #define MATLAB_NAME "alpha"
- char name[81] = MATLAB_NAME;
-
- int main(argc, argv)
- int argc;
- char *argv[];
- {
- VEC *x = VNULL, *y = VNULL, *z = VNULL, *u = VNULL, *v = VNULL,
- *w = VNULL;
- VEC *diag = VNULL, *beta = VNULL;
- PERM *pi1 = PNULL, *pi2 = PNULL, *pi3 = PNULL, *pivot = PNULL,
- *blocks = PNULL;
- MAT *A = MNULL, *Atmp = MNULL, *B = MNULL, *C = MNULL, *D = MNULL,
- *Q = MNULL, *Qtmp = MNULL, *U = MNULL;
- BAND *bA, *bB, *bC;
- Real cond_est, s1, s2, s3;
- int i, j, seed;
- FILE *fp;
- char *cp;
-
-
- mem_info_on(TRUE);
-
- setbuf(stdout,(char *)NULL);
-
- seed = 1111;
- if ( argc > 2 )
- {
- printf("usage: %s [seed]\n",argv[0]);
- exit(0);
- }
- else if ( argc == 2 )
- sscanf(argv[1], "%d", &seed);
-
- /* set seed for rand() */
- smrand(seed);
-
- mem_stat_mark(1);
-
- /* print version information */
- m_version();
-
- printf("# grep \"^Error\" the output for a listing of errors\n");
- printf("# Don't panic if you see \"Error\" appearing; \n");
- printf("# Also check the reported size of error\n");
- printf("# This program uses randomly generated problems and therefore\n");
- printf("# may occasionally produce ill-conditioned problems\n");
- printf("# Therefore check the size of the error compared with MACHEPS\n");
- printf("# If the error is within 1000*MACHEPS then don't worry\n");
- printf("# If you get an error of size 0.1 or larger there is \n");
- printf("# probably a bug in the code or the compilation procedure\n\n");
- printf("# seed = %d\n",seed);
-
- printf("# Check: MACHEPS = %g\n",MACHEPS);
- /* allocate, initialise, copy and resize operations */
- /* VEC */
- notice("vector initialise, copy & resize");
- x = v_get(12);
- y = v_get(15);
- z = v_get(12);
- v_rand(x);
- v_rand(y);
- z = v_copy(x,z);
- if ( v_norm2(v_sub(x,z,z)) >= MACHEPS )
- errmesg("VEC copy");
- v_copy(x,y);
- x = v_resize(x,10);
- y = v_resize(y,10);
- if ( v_norm2(v_sub(x,y,z)) >= MACHEPS )
- errmesg("VEC copy/resize");
- x = v_resize(x,15);
- y = v_resize(y,15);
- if ( v_norm2(v_sub(x,y,z)) >= MACHEPS )
- errmesg("VEC resize");
-
- /* MAT */
- notice("matrix initialise, copy & resize");
- A = m_get(8,5);
- B = m_get(3,9);
- C = m_get(8,5);
- m_rand(A);
- m_rand(B);
- C = m_copy(A,C);
- if ( m_norm_inf(m_sub(A,C,C)) >= MACHEPS )
- errmesg("MAT copy");
- m_copy(A,B);
- A = m_resize(A,3,5);
- B = m_resize(B,3,5);
- if ( m_norm_inf(m_sub(A,B,C)) >= MACHEPS )
- errmesg("MAT copy/resize");
- A = m_resize(A,10,10);
- B = m_resize(B,10,10);
- if ( m_norm_inf(m_sub(A,B,C)) >= MACHEPS )
- errmesg("MAT resize");
-
- MEMCHK();
-
- /* PERM */
- notice("permutation initialise, inverting & permuting vectors");
- pi1 = px_get(15);
- pi2 = px_get(12);
- px_rand(pi1);
- v_rand(x);
- px_vec(pi1,x,z);
- y = v_resize(y,x->dim);
- pxinv_vec(pi1,z,y);
- if ( v_norm2(v_sub(x,y,z)) >= MACHEPS )
- errmesg("PERMute vector");
- pi2 = px_inv(pi1,pi2);
- pi3 = px_mlt(pi1,pi2,PNULL);
- for ( i = 0; i < pi3->size; i++ )
- if ( pi3->pe[i] != i )
- errmesg("PERM inverse/multiply");
-
- /* testing catch() etc */
- notice("error handling routines");
- catch(E_NULL,
- catchall(v_add(VNULL,VNULL,VNULL);
- errmesg("tracecatch() failure"),
- printf("# tracecatch() caught error\n");
- error(E_NULL,"main"));
- errmesg("catch() failure"),
- printf("# catch() caught E_NULL error\n"));
-
- /* testing attaching a new error list (error list 2) */
-
- notice("attaching error lists");
- printf("# IT IS NOT A REAL WARNING ... \n");
- err_list_attach(2,MAX_TEST_ERR,test_err_list,TRUE);
- if (!err_is_list_attached(2))
- errmesg("attaching the error list 2");
- ev_err(__FILE__,1,__LINE__,"main",2);
- err_list_free(2);
- if (err_is_list_attached(2))
- errmesg("detaching the error list 2");
-
- /* testing inner products and v_mltadd() etc */
- notice("inner products and linear combinations");
- u = v_get(x->dim);
- v_rand(u);
- v_rand(x);
- v_resize(y,x->dim);
- v_rand(y);
- v_mltadd(y,x,-in_prod(x,y)/in_prod(x,x),z);
- if ( fabs(in_prod(x,z)) >= MACHEPS*x->dim )
- errmesg("v_mltadd()/in_prod()");
- s1 = -in_prod(x,y)/(v_norm2(x)*v_norm2(x));
- sv_mlt(s1,x,u);
- v_add(y,u,u);
- if ( v_norm2(v_sub(u,z,u)) >= MACHEPS*x->dim )
- errmesg("sv_mlt()/v_norm2()");
-
- #ifdef ANSI_C
- v_linlist(u,x,s1,y,1.0,VNULL);
- if ( v_norm2(v_sub(u,z,u)) >= MACHEPS*x->dim )
- errmesg("v_linlist()");
- #endif
- #ifdef VARARGS
- v_linlist(u,x,s1,y,1.0,VNULL);
- if ( v_norm2(v_sub(u,z,u)) >= MACHEPS*x->dim )
- errmesg("v_linlist()");
- #endif
-
-
- MEMCHK();
-
- /* vector norms */
- notice("vector norms");
- x = v_resize(x,12);
- v_rand(x);
- for ( i = 0; i < x->dim; i++ )
- if ( v_entry(x,i) >= 0.5 )
- v_set_val(x,i,1.0);
- else
- v_set_val(x,i,-1.0);
- s1 = v_norm1(x);
- s2 = v_norm2(x);
- s3 = v_norm_inf(x);
- if ( fabs(s1 - x->dim) >= MACHEPS*x->dim ||
- fabs(s2 - sqrt((Real)(x->dim))) >= MACHEPS*x->dim ||
- fabs(s3 - 1.0) >= MACHEPS )
- errmesg("v_norm1/2/_inf()");
-
- /* test matrix multiply etc */
- notice("matrix multiply and invert");
- A = m_resize(A,10,10);
- B = m_resize(B,10,10);
- m_rand(A);
- m_inverse(A,B);
- m_mlt(A,B,C);
- for ( i = 0; i < C->m; i++ )
- m_set_val(C,i,i,m_entry(C,i,i)-1.0);
- if ( m_norm_inf(C) >= MACHEPS*m_norm_inf(A)*m_norm_inf(B)*5 )
- errmesg("m_inverse()/m_mlt()");
-
- MEMCHK();
-
- /* ... and transposes */
- notice("transposes and transpose-multiplies");
- m_transp(A,A); /* can do square matrices in situ */
- mtrm_mlt(A,B,C);
- for ( i = 0; i < C->m; i++ )
- m_set_val(C,i,i,m_entry(C,i,i)-1.0);
- if ( m_norm_inf(C) >= MACHEPS*m_norm_inf(A)*m_norm_inf(B)*5 )
- errmesg("m_transp()/mtrm_mlt()");
- m_transp(A,A);
- m_transp(B,B);
- mmtr_mlt(A,B,C);
- for ( i = 0; i < C->m; i++ )
- m_set_val(C,i,i,m_entry(C,i,i)-1.0);
- if ( m_norm_inf(C) >= MACHEPS*m_norm_inf(A)*m_norm_inf(B)*5 )
- errmesg("m_transp()/mmtr_mlt()");
- sm_mlt(3.71,B,B);
- mmtr_mlt(A,B,C);
- for ( i = 0; i < C->m; i++ )
- m_set_val(C,i,i,m_entry(C,i,i)-3.71);
- if ( m_norm_inf(C) >= MACHEPS*m_norm_inf(A)*m_norm_inf(B)*5 )
- errmesg("sm_mlt()/mmtr_mlt()");
- m_transp(B,B);
- sm_mlt(1.0/3.71,B,B);
-
- MEMCHK();
-
- /* ... and matrix-vector multiplies */
- notice("matrix-vector multiplies");
- x = v_resize(x,A->n);
- y = v_resize(y,A->m);
- z = v_resize(z,A->m);
- u = v_resize(u,A->n);
- v_rand(x);
- v_rand(y);
- mv_mlt(A,x,z);
- s1 = in_prod(y,z);
- vm_mlt(A,y,u);
- s2 = in_prod(u,x);
- if ( fabs(s1 - s2) >= (MACHEPS*x->dim)*x->dim )
- errmesg("mv_mlt()/vm_mlt()");
- mv_mlt(B,z,u);
- if ( v_norm2(v_sub(u,x,u)) >= MACHEPS*m_norm_inf(A)*m_norm_inf(B)*5 )
- errmesg("mv_mlt()/m_inverse()");
-
- MEMCHK();
-
- /* get/set row/col */
- notice("getting and setting rows and cols");
- x = v_resize(x,A->n);
- y = v_resize(y,B->m);
- x = get_row(A,3,x);
- y = get_col(B,3,y);
- if ( fabs(in_prod(x,y) - 1.0) >= MACHEPS*m_norm_inf(A)*m_norm_inf(B)*5 )
- errmesg("get_row()/get_col()");
- sv_mlt(-1.0,x,x);
- sv_mlt(-1.0,y,y);
- set_row(A,3,x);
- set_col(B,3,y);
- m_mlt(A,B,C);
- for ( i = 0; i < C->m; i++ )
- m_set_val(C,i,i,m_entry(C,i,i)-1.0);
- if ( m_norm_inf(C) >= MACHEPS*m_norm_inf(A)*m_norm_inf(B)*5 )
- errmesg("set_row()/set_col()");
-
- MEMCHK();
-
- /* matrix norms */
- notice("matrix norms");
- A = m_resize(A,11,15);
- m_rand(A);
- s1 = m_norm_inf(A);
- B = m_transp(A,B);
- s2 = m_norm1(B);
- if ( fabs(s1 - s2) >= MACHEPS*A->m )
- errmesg("m_norm1()/m_norm_inf()");
- C = mtrm_mlt(A,A,C);
- s1 = 0.0;
- for ( i = 0; i < C->m && i < C->n; i++ )
- s1 += m_entry(C,i,i);
- if ( fabs(sqrt(s1) - m_norm_frob(A)) >= MACHEPS*A->m*A->n )
- errmesg("m_norm_frob");
-
- MEMCHK();
-
- /* permuting rows and columns */
- notice("permuting rows & cols");
- A = m_resize(A,11,15);
- B = m_resize(B,11,15);
- pi1 = px_resize(pi1,A->m);
- px_rand(pi1);
- x = v_resize(x,A->n);
- y = mv_mlt(A,x,y);
- px_rows(pi1,A,B);
- px_vec(pi1,y,z);
- mv_mlt(B,x,u);
- if ( v_norm2(v_sub(z,u,u)) >= MACHEPS*A->m )
- errmesg("px_rows()");
- pi1 = px_resize(pi1,A->n);
- px_rand(pi1);
- px_cols(pi1,A,B);
- pxinv_vec(pi1,x,z);
- mv_mlt(B,z,u);
- if ( v_norm2(v_sub(y,u,u)) >= MACHEPS*A->n )
- errmesg("px_cols()");
-
- MEMCHK();
-
- /* MATLAB save/load */
- notice("MATLAB save/load");
- A = m_resize(A,12,11);
- if ( (fp=fopen(SAVE_FILE,"w")) == (FILE *)NULL )
- printf("Cannot perform MATLAB save/load test\n");
- else
- {
- m_rand(A);
- m_save(fp, A, name);
- fclose(fp);
- if ( (fp=fopen(SAVE_FILE,"r")) == (FILE *)NULL )
- printf("Cannot open save file \"%s\"\n",SAVE_FILE);
- else
- {
- M_FREE(B);
- B = m_load(fp,&cp);
- if ( strcmp(name,cp) || m_norm1(m_sub(A,B,B)) >= MACHEPS*A->m )
- errmesg("mload()/m_save()");
- }
- }
-
- MEMCHK();
-
- /* Now, onto matrix factorisations */
- A = m_resize(A,10,10);
- B = m_resize(B,A->m,A->n);
- m_copy(A,B);
- x = v_resize(x,A->n);
- y = v_resize(y,A->m);
- z = v_resize(z,A->n);
- u = v_resize(u,A->m);
- v_rand(x);
- mv_mlt(B,x,y);
- z = v_copy(x,z);
-
- notice("LU factor/solve");
- pivot = px_get(A->m);
- LUfactor(A,pivot);
- tracecatch(LUsolve(A,pivot,y,x),"main");
- tracecatch(cond_est = LUcondest(A,pivot),"main");
- printf("# cond(A) approx= %g\n", cond_est);
- if ( v_norm2(v_sub(x,z,u)) >= MACHEPS*v_norm2(x)*cond_est)
- {
- errmesg("LUfactor()/LUsolve()");
- printf("# LU solution error = %g [cf MACHEPS = %g]\n",
- v_norm2(v_sub(x,z,u)), MACHEPS);
- }
-
- v_copy(y,x);
- tracecatch(LUsolve(A,pivot,x,x),"main");
- tracecatch(cond_est = LUcondest(A,pivot),"main");
- if ( v_norm2(v_sub(x,z,u)) >= MACHEPS*v_norm2(x)*cond_est)
- {
- errmesg("LUfactor()/LUsolve()");
- printf("# LU solution error = %g [cf MACHEPS = %g]\n",
- v_norm2(v_sub(x,z,u)), MACHEPS);
- }
-
- vm_mlt(B,z,y);
- v_copy(y,x);
- tracecatch(LUTsolve(A,pivot,x,x),"main");
- if ( v_norm2(v_sub(x,z,u)) >= MACHEPS*v_norm2(x)*cond_est)
- {
- errmesg("LUfactor()/LUTsolve()");
- printf("# LU solution error = %g [cf MACHEPS = %g]\n",
- v_norm2(v_sub(x,z,u)), MACHEPS);
- }
-
- MEMCHK();
-
- /* QR factorisation */
- m_copy(B,A);
- mv_mlt(B,z,y);
- notice("QR factor/solve:");
- diag = v_get(A->m);
- beta = v_get(A->m);
- QRfactor(A,diag);
- QRsolve(A,diag,y,x);
- if ( v_norm2(v_sub(x,z,u)) >= MACHEPS*v_norm2(x)*cond_est )
- {
- errmesg("QRfactor()/QRsolve()");
- printf("# QR solution error = %g [cf MACHEPS = %g]\n",
- v_norm2(v_sub(x,z,u)), MACHEPS);
- }
- Q = m_get(A->m,A->m);
- makeQ(A,diag,Q);
- makeR(A,A);
- m_mlt(Q,A,C);
- m_sub(B,C,C);
- if ( m_norm1(C) >= MACHEPS*m_norm1(Q)*m_norm1(B) )
- {
- errmesg("QRfactor()/makeQ()/makeR()");
- printf("# QR reconstruction error = %g [cf MACHEPS = %g]\n",
- m_norm1(C), MACHEPS);
- }
-
- MEMCHK();
-
- /* now try with a non-square matrix */
- A = m_resize(A,15,7);
- m_rand(A);
- B = m_copy(A,B);
- diag = v_resize(diag,A->n);
- beta = v_resize(beta,A->n);
- x = v_resize(x,A->n);
- y = v_resize(y,A->m);
- v_rand(y);
- QRfactor(A,diag);
- x = QRsolve(A,diag,y,x);
- /* z is the residual vector */
- mv_mlt(B,x,z); v_sub(z,y,z);
- /* check B^T.z = 0 */
- vm_mlt(B,z,u);
- if ( v_norm2(u) >= MACHEPS*m_norm1(B)*v_norm2(y) )
- {
- errmesg("QRfactor()/QRsolve()");
- printf("# QR solution error = %g [cf MACHEPS = %g]\n",
- v_norm2(u), MACHEPS);
- }
- Q = m_resize(Q,A->m,A->m);
- makeQ(A,diag,Q);
- makeR(A,A);
- m_mlt(Q,A,C);
- m_sub(B,C,C);
- if ( m_norm1(C) >= MACHEPS*m_norm1(Q)*m_norm1(B) )
- {
- errmesg("QRfactor()/makeQ()/makeR()");
- printf("# QR reconstruction error = %g [cf MACHEPS = %g]\n",
- m_norm1(C), MACHEPS);
- }
- D = m_get(A->m,Q->m);
- mtrm_mlt(Q,Q,D);
- for ( i = 0; i < D->m; i++ )
- m_set_val(D,i,i,m_entry(D,i,i)-1.0);
- if ( m_norm1(D) >= MACHEPS*m_norm1(Q)*m_norm_inf(Q) )
- {
- errmesg("QRfactor()/makeQ()/makeR()");
- printf("# QR orthogonality error = %g [cf MACHEPS = %g]\n",
- m_norm1(D), MACHEPS);
- }
-
- MEMCHK();
-
- /* QRCP factorisation */
- m_copy(B,A);
- notice("QR factor/solve with column pivoting");
- pivot = px_resize(pivot,A->n);
- QRCPfactor(A,diag,pivot);
- z = v_resize(z,A->n);
- QRCPsolve(A,diag,pivot,y,z);
- /* pxinv_vec(pivot,z,x); */
- /* now compute residual (z) vector */
- mv_mlt(B,x,z); v_sub(z,y,z);
- /* check B^T.z = 0 */
- vm_mlt(B,z,u);
- if ( v_norm2(u) >= MACHEPS*m_norm1(B)*v_norm2(y) )
- {
- errmesg("QRCPfactor()/QRsolve()");
- printf("# QR solution error = %g [cf MACHEPS = %g]\n",
- v_norm2(u), MACHEPS);
- }
-
- Q = m_resize(Q,A->m,A->m);
- makeQ(A,diag,Q);
- makeR(A,A);
- m_mlt(Q,A,C);
- M_FREE(D);
- D = m_get(B->m,B->n);
- px_cols(pivot,C,D);
- m_sub(B,D,D);
- if ( m_norm1(D) >= MACHEPS*m_norm1(Q)*m_norm1(B) )
- {
- errmesg("QRCPfactor()/makeQ()/makeR()");
- printf("# QR reconstruction error = %g [cf MACHEPS = %g]\n",
- m_norm1(D), MACHEPS);
- }
-
- MEMCHK();
-
- /* Cholesky and LDL^T factorisation */
- /* Use these for normal equations approach */
- notice("Cholesky factor/solve");
- mtrm_mlt(B,B,A);
- CHfactor(A);
- u = v_resize(u,B->n);
- vm_mlt(B,y,u);
- z = v_resize(z,B->n);
- CHsolve(A,u,z);
- v_sub(x,z,z);
- if ( v_norm2(z) >= MACHEPS*v_norm2(x)*100 )
- {
- errmesg("CHfactor()/CHsolve()");
- printf("# Cholesky solution error = %g [cf MACHEPS = %g]\n",
- v_norm2(z), MACHEPS);
- }
- /* modified Cholesky factorisation should be identical with Cholesky
- factorisation provided the matrix is "sufficiently positive definite */
- mtrm_mlt(B,B,C);
- MCHfactor(C,MACHEPS);
- m_sub(A,C,C);
- if ( m_norm1(C) >= MACHEPS*m_norm1(A) )
- {
- errmesg("MCHfactor()");
- printf("# Modified Cholesky error = %g [cf MACHEPS = %g]\n",
- m_norm1(C), MACHEPS);
- }
- /* now test the LDL^T factorisation -- using a negative def. matrix */
- mtrm_mlt(B,B,A);
- sm_mlt(-1.0,A,A);
- m_copy(A,C);
- LDLfactor(A);
- LDLsolve(A,u,z);
- w = v_get(A->m);
- mv_mlt(C,z,w);
- v_sub(w,u,w);
- if ( v_norm2(w) >= MACHEPS*v_norm2(u)*m_norm1(C) )
- {
- errmesg("LDLfactor()/LDLsolve()");
- printf("# LDL^T residual = %g [cf MACHEPS = %g]\n",
- v_norm2(w), MACHEPS);
- }
- v_add(x,z,z);
- if ( v_norm2(z) >= MACHEPS*v_norm2(x)*100 )
- {
- errmesg("LDLfactor()/LDLsolve()");
- printf("# LDL^T solution error = %g [cf MACHEPS = %g]\n",
- v_norm2(z), MACHEPS);
- }
-
- MEMCHK();
-
- /* and now the Bunch-Kaufman-Parlett method */
- /* set up D to be an indefinite diagonal matrix */
- notice("Bunch-Kaufman-Parlett factor/solve");
-
- D = m_resize(D,B->m,B->m);
- m_zero(D);
- w = v_resize(w,B->m);
- v_rand(w);
- for ( i = 0; i < w->dim; i++ )
- if ( v_entry(w,i) >= 0.5 )
- m_set_val(D,i,i,1.0);
- else
- m_set_val(D,i,i,-1.0);
- /* set A <- B^T.D.B */
- C = m_resize(C,B->n,B->n);
- C = mtrm_mlt(B,D,C);
- A = m_mlt(C,B,A);
- C = m_resize(C,B->n,B->n);
- C = m_copy(A,C);
- /* ... and use BKPfactor() */
- blocks = px_get(A->m);
- pivot = px_resize(pivot,A->m);
- x = v_resize(x,A->m);
- y = v_resize(y,A->m);
- z = v_resize(z,A->m);
- v_rand(x);
- mv_mlt(A,x,y);
- BKPfactor(A,pivot,blocks);
- printf("# BKP pivot =\n"); px_output(pivot);
- printf("# BKP blocks =\n"); px_output(blocks);
- BKPsolve(A,pivot,blocks,y,z);
- /* compute & check residual */
- mv_mlt(C,z,w);
- v_sub(w,y,w);
- if ( v_norm2(w) >= MACHEPS*m_norm1(C)*v_norm2(z) )
- {
- errmesg("BKPfactor()/BKPsolve()");
- printf("# BKP residual size = %g [cf MACHEPS = %g]\n",
- v_norm2(w), MACHEPS);
- }
-
- /* check update routines */
- /* check LDLupdate() first */
- notice("update L.D.L^T routine");
- A = mtrm_mlt(B,B,A);
- m_resize(C,A->m,A->n);
- C = m_copy(A,C);
- LDLfactor(A);
- s1 = 3.7;
- w = v_resize(w,A->m);
- v_rand(w);
- for ( i = 0; i < C->m; i++ )
- for ( j = 0; j < C->n; j++ )
- m_set_val(C,i,j,m_entry(C,i,j)+s1*v_entry(w,i)*v_entry(w,j));
- LDLfactor(C);
- LDLupdate(A,w,s1);
- /* zero out strictly upper triangular parts of A and C */
- for ( i = 0; i < A->m; i++ )
- for ( j = i+1; j < A->n; j++ )
- {
- m_set_val(A,i,j,0.0);
- m_set_val(C,i,j,0.0);
- }
- if ( m_norm1(m_sub(A,C,C)) >= sqrt(MACHEPS)*m_norm1(A) )
- {
- errmesg("LDLupdate()");
- printf("# LDL update matrix error = %g [cf MACHEPS = %g]\n",
- m_norm1(C), MACHEPS);
- }
-
-
- /* BAND MATRICES */
-
- #define COL 40
- #define UDIAG 5
- #define LDIAG 2
-
- smrand(101);
- bA = bd_get(LDIAG,UDIAG,COL);
- bB = bd_get(LDIAG,UDIAG,COL);
- bC = bd_get(LDIAG,UDIAG,COL);
- A = m_resize(A,COL,COL);
- B = m_resize(B,COL,COL);
- pivot = px_resize(pivot,COL);
- x = v_resize(x,COL);
- w = v_resize(w,COL);
- z = v_resize(z,COL);
-
- m_rand(A);
- /* generate band matrix */
- mat2band(A,LDIAG,UDIAG,bA);
- band2mat(bA,A); /* now A is banded */
- bB = bd_copy(bA,bB);
-
- v_rand(x);
- mv_mlt(A,x,w);
- z = v_copy(w,z);
-
- notice("band LU factorization");
- bdLUfactor(bA,pivot);
-
- /* pivot will be changed */
- bdLUsolve(bA,pivot,z,z);
- v_sub(x,z,z);
- if (v_norm2(z) > v_norm2(x)*sqrt(MACHEPS)) {
- errmesg("incorrect solution (band LU factorization)");
- printf(" ||exact sol. - computed sol.|| = %g [MACHEPS = %g]\n",
- v_norm2(z),MACHEPS);
- }
-
- /* solve transpose system */
-
- notice("band LU factorization for transpose system");
- m_transp(A,B);
- mv_mlt(B,x,w);
-
- bd_copy(bB,bA);
- bd_transp(bA,bA);
- /* transposition in situ */
- bd_transp(bA,bA);
- bd_transp(bA,bB);
-
- bdLUfactor(bB,pivot);
-
- bdLUsolve(bB,pivot,w,z);
- v_sub(x,z,z);
- if (v_norm2(z) > v_norm2(x)*sqrt(MACHEPS)) {
- errmesg("incorrect solution (band transposed LU factorization)");
- printf(" ||exact sol. - computed sol.|| = %g [MACHEPS = %g]\n",
- v_norm2(z),MACHEPS);
- }
-
-
- /* Cholesky factorization */
-
- notice("band Choleski LDL' factorization");
- m_add(A,B,A); /* symmetric matrix */
- for (i=0; i < COL; i++) /* positive definite */
- A->me[i][i] += 2*LDIAG;
-
- mat2band(A,LDIAG,LDIAG,bA);
- band2mat(bA,A); /* corresponding matrix A */
-
- v_rand(x);
- mv_mlt(A,x,w);
- z = v_copy(w,z);
-
- bdLDLfactor(bA);
-
- z = bdLDLsolve(bA,z,z);
- v_sub(x,z,z);
- if (v_norm2(z) > v_norm2(x)*sqrt(MACHEPS)) {
- errmesg("incorrect solution (band LDL' factorization)");
- printf(" ||exact sol. - computed sol.|| = %g [MACHEPS = %g]\n",
- v_norm2(z),MACHEPS);
- }
-
- /* new bandwidths */
- m_rand(A);
- bA = bd_resize(bA,UDIAG,LDIAG,COL);
- bB = bd_resize(bB,UDIAG,LDIAG,COL);
- mat2band(A,UDIAG,LDIAG,bA);
- band2mat(bA,A);
- bd_copy(bA,bB);
-
- mv_mlt(A,x,w);
-
- notice("band LU factorization (resized)");
- bdLUfactor(bA,pivot);
-
- /* pivot will be changed */
- bdLUsolve(bA,pivot,w,z);
- v_sub(x,z,z);
- if (v_norm2(z) > v_norm2(x)*sqrt(MACHEPS)) {
- errmesg("incorrect solution (band LU factorization)");
- printf(" ||exact sol. - computed sol.|| = %g [MACHEPS = %g]\n",
- v_norm2(z),MACHEPS);
- }
-
- /* testing transposition */
-
- notice("band matrix transposition");
- m_zero(bA->mat);
- bd_copy(bB,bA);
- m_zero(bB->mat);
- bd_copy(bA,bB);
-
- bd_transp(bB,bB);
- bd_transp(bB,bB);
-
- m_zero(bC->mat);
- bd_copy(bB,bC);
-
- m_sub(bA->mat,bC->mat,bC->mat);
- if (m_norm_inf(bC->mat) > MACHEPS*bC->mat->n) {
- errmesg("band transposition");
- printf(" difference ||A - (A')'|| = %g\n",m_norm_inf(bC->mat));
- }
-
- bd_free(bA);
- bd_free(bB);
- bd_free(bC);
-
-
- MEMCHK();
-
- /* now check QRupdate() routine */
- notice("update QR routine");
-
- B = m_resize(B,15,7);
- A = m_resize(A,B->m,B->n);
- m_copy(B,A);
- diag = v_resize(diag,A->n);
- beta = v_resize(beta,A->n);
- QRfactor(A,diag);
- Q = m_resize(Q,A->m,A->m);
- makeQ(A,diag,Q);
- makeR(A,A);
- m_resize(C,A->m,A->n);
- w = v_resize(w,A->m);
- v = v_resize(v,A->n);
- u = v_resize(u,A->m);
- v_rand(w);
- v_rand(v);
- vm_mlt(Q,w,u);
- QRupdate(Q,A,u,v);
- m_mlt(Q,A,C);
- for ( i = 0; i < B->m; i++ )
- for ( j = 0; j < B->n; j++ )
- m_set_val(B,i,j,m_entry(B,i,j)+v_entry(w,i)*v_entry(v,j));
- m_sub(B,C,C);
- if ( m_norm1(C) >= MACHEPS*m_norm1(A)*m_norm1(Q)*2 )
- {
- errmesg("QRupdate()");
- printf("# Reconstruction error in QR update = %g [cf MACHEPS = %g]\n",
- m_norm1(C), MACHEPS);
- }
- m_resize(D,Q->m,Q->n);
- mtrm_mlt(Q,Q,D);
- for ( i = 0; i < D->m; i++ )
- m_set_val(D,i,i,m_entry(D,i,i)-1.0);
- if ( m_norm1(D) >= 10*MACHEPS*m_norm1(Q)*m_norm_inf(Q) )
- {
- errmesg("QRupdate()");
- printf("# QR update orthogonality error = %g [cf MACHEPS = %g]\n",
- m_norm1(D), MACHEPS);
- }
-
- /* Now check eigenvalue/SVD routines */
- notice("eigenvalue and SVD routines");
- A = m_resize(A,11,11);
- B = m_resize(B,A->m,A->n);
- C = m_resize(C,A->m,A->n);
- D = m_resize(D,A->m,A->n);
- Q = m_resize(Q,A->m,A->n);
-
- m_rand(A);
- /* A <- A + A^T for symmetric case */
- m_add(A,m_transp(A,C),A);
- u = v_resize(u,A->m);
- u = symmeig(A,Q,u);
- m_zero(B);
- for ( i = 0; i < B->m; i++ )
- m_set_val(B,i,i,v_entry(u,i));
- m_mlt(Q,B,C);
- mmtr_mlt(C,Q,D);
- m_sub(A,D,D);
- if ( m_norm1(D) >= MACHEPS*m_norm1(Q)*m_norm_inf(Q)*v_norm_inf(u)*3 )
- {
- errmesg("symmeig()");
- printf("# Reconstruction error = %g [cf MACHEPS = %g]\n",
- m_norm1(D), MACHEPS);
- }
- mtrm_mlt(Q,Q,D);
- for ( i = 0; i < D->m; i++ )
- m_set_val(D,i,i,m_entry(D,i,i)-1.0);
- if ( m_norm1(D) >= MACHEPS*m_norm1(Q)*m_norm_inf(Q)*3 )
- {
- errmesg("symmeig()");
- printf("# symmeig() orthogonality error = %g [cf MACHEPS = %g]\n",
- m_norm1(D), MACHEPS);
- }
-
- MEMCHK();
-
- /* now test (real) Schur decomposition */
- /* m_copy(A,B); */
- M_FREE(A);
- A = m_get(11,11);
- m_rand(A);
- B = m_copy(A,B);
- MEMCHK();
-
- B = schur(B,Q);
- MEMCHK();
-
- m_mlt(Q,B,C);
- mmtr_mlt(C,Q,D);
- MEMCHK();
- m_sub(A,D,D);
- if ( m_norm1(D) >= MACHEPS*m_norm1(Q)*m_norm_inf(Q)*m_norm1(B)*5 )
- {
- errmesg("schur()");
- printf("# Schur reconstruction error = %g [cf MACHEPS = %g]\n",
- m_norm1(D), MACHEPS);
- }
-
- /* orthogonality check */
- mmtr_mlt(Q,Q,D);
- for ( i = 0; i < D->m; i++ )
- m_set_val(D,i,i,m_entry(D,i,i)-1.0);
- if ( m_norm1(D) >= MACHEPS*m_norm1(Q)*m_norm_inf(Q)*10 )
- {
- errmesg("schur()");
- printf("# Schur orthogonality error = %g [cf MACHEPS = %g]\n",
- m_norm1(D), MACHEPS);
- }
-
- MEMCHK();
-
- /* check for termination */
- Atmp = m_get(2,2);
- Qtmp = m_get(2,2);
- /* this is a 2 x 2 matrix with real eigenvalues */
- Atmp->me[0][0] = 1;
- Atmp->me[1][1] = 1;
- Atmp->me[0][1] = 4;
- Atmp->me[1][0] = 1;
- schur(Atmp,Qtmp);
-
- MEMCHK();
-
- /* now test SVD */
- A = m_resize(A,11,7);
- m_rand(A);
- U = m_get(A->n,A->n);
- Q = m_resize(Q,A->m,A->m);
- u = v_resize(u,max(A->m,A->n));
- svd(A,Q,U,u);
- /* check reconstruction of A */
- D = m_resize(D,A->m,A->n);
- C = m_resize(C,A->m,A->n);
- m_zero(D);
- for ( i = 0; i < min(A->m,A->n); i++ )
- m_set_val(D,i,i,v_entry(u,i));
- mtrm_mlt(Q,D,C);
- m_mlt(C,U,D);
- m_sub(A,D,D);
- if ( m_norm1(D) >= MACHEPS*m_norm1(U)*m_norm_inf(Q)*m_norm1(A) )
- {
- errmesg("svd()");
- printf("# SVD reconstruction error = %g [cf MACHEPS = %g]\n",
- m_norm1(D), MACHEPS);
- }
- /* check orthogonality of Q and U */
- D = m_resize(D,Q->n,Q->n);
- mtrm_mlt(Q,Q,D);
- for ( i = 0; i < D->m; i++ )
- m_set_val(D,i,i,m_entry(D,i,i)-1.0);
- if ( m_norm1(D) >= MACHEPS*m_norm1(Q)*m_norm_inf(Q)*5 )
- {
- errmesg("svd()");
- printf("# SVD orthognality error (Q) = %g [cf MACHEPS = %g\n",
- m_norm1(D), MACHEPS);
- }
- D = m_resize(D,U->n,U->n);
- mtrm_mlt(U,U,D);
- for ( i = 0; i < D->m; i++ )
- m_set_val(D,i,i,m_entry(D,i,i)-1.0);
- if ( m_norm1(D) >= MACHEPS*m_norm1(U)*m_norm_inf(U)*5 )
- {
- errmesg("svd()");
- printf("# SVD orthognality error (U) = %g [cf MACHEPS = %g\n",
- m_norm1(D), MACHEPS);
- }
- for ( i = 0; i < u->dim; i++ )
- if ( v_entry(u,i) < 0 || (i < u->dim-1 &&
- v_entry(u,i+1) > v_entry(u,i)) )
- break;
- if ( i < u->dim )
- {
- errmesg("svd()");
- printf("# SVD sorting error\n");
- }
-
-
- /* test of long vectors */
- notice("Long vectors");
- x = v_resize(x,100000);
- y = v_resize(y,100000);
- z = v_resize(z,100000);
- v_rand(x);
- v_rand(y);
- v_mltadd(x,y,3.0,z);
- sv_mlt(1.0/3.0,z,z);
- v_mltadd(z,x,-1.0/3.0,z);
- v_sub(z,y,x);
- if (v_norm2(x) >= MACHEPS*(x->dim)) {
- errmesg("long vectors");
- printf(" norm = %g\n",v_norm2(x));
- }
-
- mem_stat_free(1);
-
- MEMCHK();
-
- /**************************************************
- VEC *x, *y, *z, *u, *v, *w;
- VEC *diag, *beta;
- PERM *pi1, *pi2, *pi3, *pivot, *blocks;
- MAT *A, *B, *C, *D, *Q, *U;
- **************************************************/
- V_FREE(x); V_FREE(y); V_FREE(z);
- V_FREE(u); V_FREE(v); V_FREE(w);
- V_FREE(diag); V_FREE(beta);
- PX_FREE(pi1); PX_FREE(pi2); PX_FREE(pi3);
- PX_FREE(pivot); PX_FREE(blocks);
- M_FREE(A); M_FREE(B); M_FREE(C);
- M_FREE(D); M_FREE(Q); M_FREE(U);
- M_FREE(Atmp); M_FREE(Qtmp);
-
- MEMCHK();
- printf("# Finished torture test\n");
- mem_info();
-
- return 0;
- }
-
-