87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
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// Copyright 2008-2016 National ICT Australia (NICTA)
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// ------------------------------------------------------------------------
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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 = nullptr
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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.soft_reset();
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U.soft_reset();
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arma_debug_warn_level(3, "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 = nullptr
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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.soft_reset();
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U.soft_reset();
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P.soft_reset();
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arma_debug_warn_level(3, "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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