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Diffstat (limited to 'src/c/matrixOperations/spec2/dspec2a.c')
-rw-r--r-- | src/c/matrixOperations/spec2/dspec2a.c | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/src/c/matrixOperations/spec2/dspec2a.c b/src/c/matrixOperations/spec2/dspec2a.c deleted file mode 100644 index 98b2c5a..0000000 --- a/src/c/matrixOperations/spec2/dspec2a.c +++ /dev/null @@ -1,113 +0,0 @@ -/* - * Scilab ( http://www.scilab.org/ ) - This file is part of Scilab - * Copyright (C) 2008 - INRIA - Arnaud TORSET - * - * This file must be used under the terms of the CeCILL. - * This source file is licensed as described in the file COPYING, which - * you should have received as part of this distribution. The terms - * are also available at - * http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt - * - */ - -#include <stdlib.h> -#include "spec.h" -#include "lapack.h" -#include "zeros.h" -#include "max.h" - -void dspec2a(double* in, int rows,double* eigenvalues,double* eigenvectors){ - int i=0, j=0, ij=0, ij1=0; - int symmetric=0; - int INFO=0; - int iWorkSize = 0; - double* pdblWork; - double* outReal; - double* outImag; - double* pdblLeftvectors; - double* pdblRightvectors; - double* inCopy; - - /* FIXME : malloc here */ - inCopy = (double*)malloc((unsigned int)(rows*rows) * sizeof(double)); - outReal = (double*)malloc((unsigned int)rows * sizeof(double)); - outImag = NULL; - pdblLeftvectors=NULL; - pdblRightvectors=NULL; - - - iWorkSize = 4*rows; - pdblWork = (double*)malloc((unsigned int)iWorkSize * sizeof(double)); - - for(i=0;i<rows*rows;i++) inCopy[i]=in[i]; - - - - /* look if the matrix is symmetric */ - for (i=0;i<rows;i++){ - for (j=0;j<rows;j++) - if (in[i*rows+j]!=in[i+j*rows]) break; - if (j!=rows) break; - - } - - /* the matrix is symmetric if the 2 loops goes to end i.e - i==rows and j==rows */ - if ((i==rows)&&(j==rows)) symmetric=1; - - /* apply lapack function according to symmetry */ - if(symmetric){ - C2F(dsyev)( "V", "U", &rows, inCopy, &rows, outReal, pdblWork, &iWorkSize, &INFO ); - - /* Computation of eigenvectors */ - for (i=0;i<rows*rows;i++) eigenvectors[i] = inCopy[i]; - } - else { - pdblRightvectors=(double*)malloc((unsigned int)(rows*rows) * sizeof(double)); - outImag = (double*)malloc((unsigned int)rows * sizeof(double)); - C2F(dgeev)( "N", "V", &rows, inCopy, &rows, outReal, outImag, - pdblLeftvectors, &rows, pdblRightvectors, &rows, pdblWork, &iWorkSize, &INFO ); - - /* Computation of eigenvectors */ - j=0; - while (j<rows) - { - if (outImag[j]==0) - { - for(i = 0 ; i < rows ; i++) - { - ij = i + j * rows; - eigenvectors[ij] = pdblRightvectors[ij]; - } - j = j + 1; - } - else - { - for(i = 0 ; i < rows ; i++) - { - ij = i + j * rows; - ij1 = i + (j + 1) * rows; - eigenvectors[ij] = pdblRightvectors[ij]; - eigenvectors[ij1] = pdblRightvectors[ij]; - } - j = j + 2; - } - } - } - - /* Computation of eigenvalues */ - dzerosa(eigenvalues,1,rows*rows); - for (i=0;i<rows;i++) eigenvalues[i+i*rows]=outReal[i]; - - - - - free(inCopy); - free(outReal); - free(outImag); - free(pdblLeftvectors); - free(pdblRightvectors); - free(pdblWork); - -} - |