op_chol_meat.hpp

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00001 // Copyright (C) 2010 NICTA and the authors listed below
00002 // http://nicta.com.au
00003 // 
00004 // Authors:
00005 // - Conrad Sanderson (conradsand at ieee dot org)
00006 // 
00007 // This file is part of the Armadillo C++ library.
00008 // It is provided without any warranty of fitness
00009 // for any purpose. You can redistribute this file
00010 // and/or modify it under the terms of the GNU
00011 // Lesser General Public License (LGPL) as published
00012 // by the Free Software Foundation, either version 3
00013 // of the License or (at your option) any later version.
00014 // (see http://www.opensource.org/licenses for more info)
00015 
00016 
00017 //! \addtogroup op_chol
00018 //! @{
00019 
00020 
00021 
00022 template<typename T1>
00023 inline
00024 void
00025 op_chol::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_chol>& X)
00026   {
00027   arma_extra_debug_sigprint();
00028   
00029   typedef typename T1::elem_type eT;
00030   
00031   const unwrap_check<T1> tmp(X.m, out);
00032   const Mat<eT>&     A = tmp.M;
00033   
00034   arma_debug_check( (A.is_square() == false), "chol(): given matrix is not square");
00035   
00036   const bool ok = auxlib::chol(out, A);
00037   
00038   if(ok == false)
00039     {
00040     out.reset();
00041     arma_print("chol(): matrix factorisation failed");
00042     }
00043   }
00044 
00045 
00046 
00047 //! @}