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 fn_inv 00018 //! @{ 00019 00020 00021 00022 //! delayed matrix inverse 00023 template<typename T1> 00024 arma_inline 00025 const Op<T1, op_inv> 00026 inv(const Base<typename T1::elem_type,T1>& X, const typename arma_blas_type_only<typename T1::elem_type>::result* junk = 0) 00027 { 00028 arma_extra_debug_sigprint(); 00029 00030 return Op<T1, op_inv>(X.get_ref()); 00031 } 00032 00033 00034 00035 //! remove the inverse operation if applied twice consecutively 00036 template<typename T1> 00037 arma_inline 00038 const T1& 00039 inv(const Op<T1, op_inv>& X) 00040 { 00041 arma_extra_debug_sigprint(); 00042 00043 return X.m; 00044 } 00045 00046 00047 00048 //! @}