67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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//
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// 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_qz
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//! @{
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//! QZ decomposition for pair of N-by-N general matrices A and B
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template<typename T1, typename T2>
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inline
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typename
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enable_if2
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<
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is_supported_blas_type<typename T1::elem_type>::value,
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bool
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>::result
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qz
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(
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Mat<typename T1::elem_type>& AA,
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Mat<typename T1::elem_type>& BB,
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Mat<typename T1::elem_type>& Q,
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Mat<typename T1::elem_type>& Z,
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const Base<typename T1::elem_type,T1>& A_expr,
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const Base<typename T1::elem_type,T2>& B_expr,
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const char* select = "none"
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)
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{
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arma_debug_sigprint();
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const char sig = (select != nullptr) ? select[0] : char(0);
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arma_conform_check( ( (sig != 'n') && (sig != 'l') && (sig != 'r') && (sig != 'i') && (sig != 'o') ), "qz(): unknown select form" );
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const bool status = auxlib::qz(AA, BB, Q, Z, A_expr.get_ref(), B_expr.get_ref(), sig);
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if(status == false)
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{
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AA.soft_reset();
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BB.soft_reset();
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Q.soft_reset();
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Z.soft_reset();
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arma_warn(3, "qz(): decomposition failed");
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}
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return status;
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}
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//! @}
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