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Diffstat (limited to 'btl/accuracy/lapack/lapack_SVD.hh')
-rw-r--r-- | btl/accuracy/lapack/lapack_SVD.hh | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/btl/accuracy/lapack/lapack_SVD.hh b/btl/accuracy/lapack/lapack_SVD.hh deleted file mode 100644 index 7dc2ab1..0000000 --- a/btl/accuracy/lapack/lapack_SVD.hh +++ /dev/null @@ -1,57 +0,0 @@ -//===================================================== -// Copyright (C) 2011 Andrea Arteaga <andyspiros@gmail.com> -//===================================================== -// -// This program is free software; you can redistribute it and/or -// modify it under the terms of the GNU General Public License -// as published by the Free Software Foundation; either version 2 -// of the License, or (at your option) any later version. -// -// This program is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License for more details. -// You should have received a copy of the GNU General Public License -// along with this program; if not, write to the Free Software -// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -// -#ifndef LAPACK_SVD_HH -#define LAPACK_SVD_HH - -#include "LinearCongruential.hh" -#include "diff.hh" - -double test_SVD(const int& N, const unsigned& seed = 0) -{ - LinearCongruential lc(seed); - - vector<double> A(N*N), Acopy, U(N*N), VT(N*N), S_(N), S(N*N); - vector<double> work(1); - - /* Fill A and Acopy */ - for (int i = 0; i < N*N; ++i) - A[i] = lc.get_01(); - Acopy = A; - - /* Retrieve lwork */ - int lwork = -1, info; - dgesvd_("A", "A", &N, &N, &A[0], &N, &S_[0], &U[0], &N, &VT[0], &N, &work[0], &lwork, &info); - lwork = work[0]; - work.resize(lwork); - - /* Compute decomposition */ - dgesvd_("A", "A", &N, &N, &A[0], &N, &S_[0], &U[0], &N, &VT[0], &N, &work[0], &lwork, &info); - - /* Construct S */ - for (int r = 0; r < N; ++r) - S[r+r*N] = S_[r]; - - /* Test */ - const double dONE = 1., dZERO = 0.; - dgemm_("N", "N", &N, &N, &N, &dONE, &U[0], &N, &S[0], &N, &dZERO, &A[0], &N); - dgemm_("N", "N", &N, &N, &N, &dONE, &A[0], &N, &VT[0], &N, &dZERO, &S[0], &N); - - return diff(Acopy, S); -} - -#endif /* LAPACK_SVD_HH */ |