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// SPDX-License-Identifier: Apache-2.0
//
// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
// Copyright 2008-2016 National ICT Australia (NICTA)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------
//! \addtogroup fn_pinv
//! @{
template<typename T1>
arma_warn_unused
inline
typename enable_if2< is_real<typename T1::pod_type>::value, const Op<T1, op_pinv_default> >::result
pinv
(
const Base<typename T1::elem_type,T1>& X
)
{
arma_extra_debug_sigprint();
return Op<T1, op_pinv_default>(X.get_ref());
}
template<typename T1>
arma_warn_unused
inline
typename enable_if2< is_real<typename T1::pod_type>::value, const Op<T1, op_pinv> >::result
pinv
(
const Base<typename T1::elem_type,T1>& X,
const typename T1::pod_type tol,
const char* method = nullptr
)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
uword method_id = 0; // default setting
if(method != nullptr)
{
const char sig = method[0];
arma_debug_check( ((sig != 's') && (sig != 'd')), "pinv(): unknown method specified" );
if(sig == 's') { method_id = 1; }
if(sig == 'd') { method_id = 2; }
}
return Op<T1, op_pinv>(X.get_ref(), eT(tol), method_id, uword(0));
}
template<typename T1>
inline
typename enable_if2< is_real<typename T1::pod_type>::value, bool >::result
pinv
(
Mat<typename T1::elem_type>& out,
const Base<typename T1::elem_type,T1>& X,
const typename T1::pod_type tol = 0.0,
const char* method = nullptr
)
{
arma_extra_debug_sigprint();
uword method_id = 0; // default setting
if(method != nullptr)
{
const char sig = method[0];
arma_debug_check( ((sig != 's') && (sig != 'd')), "pinv(): unknown method specified" );
if(sig == 's') { method_id = 1; }
if(sig == 'd') { method_id = 2; }
}
const bool status = op_pinv::apply_direct(out, X.get_ref(), tol, method_id);
if(status == false)
{
out.soft_reset();
arma_debug_warn_level(3, "pinv(): svd failed");
}
return status;
}
//! @}
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