81 lines
1.8 KiB
C++
81 lines
1.8 KiB
C++
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// Copyright (C) 2008-2011 National ICT Australia (NICTA)
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// -------------------------------------------------------------------
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//
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// Written by Conrad Sanderson - http://conradsanderson.id.au
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//! \addtogroup fn_lu
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//! @{
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//! immediate lower upper decomposition, permutation info is embedded into L (similar to Matlab/Octave)
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template<typename T1>
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inline
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bool
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lu
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(
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Mat<typename T1::elem_type>& L,
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Mat<typename T1::elem_type>& U,
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const Base<typename T1::elem_type,T1>& X,
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const typename arma_blas_type_only<typename T1::elem_type>::result* junk = 0
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)
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{
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arma_extra_debug_sigprint();
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arma_ignore(junk);
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arma_debug_check( (&L == &U), "lu(): L and U are the same object");
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const bool status = auxlib::lu(L, U, X);
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if(status == false)
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{
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L.reset();
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U.reset();
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arma_debug_warn("lu(): decomposition failed");
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}
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return status;
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}
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//! immediate lower upper decomposition, also providing the permutation matrix
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template<typename T1>
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inline
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bool
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lu
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(
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Mat<typename T1::elem_type>& L,
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Mat<typename T1::elem_type>& U,
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Mat<typename T1::elem_type>& P,
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const Base<typename T1::elem_type,T1>& X,
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const typename arma_blas_type_only<typename T1::elem_type>::result* junk = 0
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)
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{
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arma_extra_debug_sigprint();
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arma_ignore(junk);
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arma_debug_check( ( (&L == &U) || (&L == &P) || (&U == &P) ), "lu(): two or more output objects are the same object");
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const bool status = auxlib::lu(L, U, P, X);
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if(status == false)
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{
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L.reset();
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U.reset();
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P.reset();
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arma_debug_warn("lu(): decomposition failed");
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}
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return status;
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}
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//! @}
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