126 lines
2.8 KiB
C++
126 lines
2.8 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_sprandu
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//! @{
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//! Generate a sparse matrix with a randomly selected subset of the elements
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//! set to random values in the [0,1] interval (uniform distribution)
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template<typename obj_type>
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arma_warn_unused
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inline
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obj_type
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sprandu
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(
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const uword n_rows,
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const uword n_cols,
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const double density,
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const typename arma_SpMat_SpCol_SpRow_only<obj_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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if(is_SpCol<obj_type>::value)
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{
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arma_debug_check( (n_cols != 1), "sprandu(): incompatible size" );
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}
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else
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if(is_SpRow<obj_type>::value)
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{
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arma_debug_check( (n_rows != 1), "sprandu(): incompatible size" );
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}
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obj_type out;
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out.sprandu(n_rows, n_cols, density);
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return out;
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}
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template<typename obj_type>
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arma_warn_unused
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inline
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obj_type
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sprandu(const SizeMat& s, const double density, const typename arma_SpMat_SpCol_SpRow_only<obj_type>::result* junk = nullptr)
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{
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arma_extra_debug_sigprint();
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arma_ignore(junk);
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return sprandu<obj_type>(s.n_rows, s.n_cols, density);
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}
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arma_warn_unused
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inline
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sp_mat
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sprandu(const uword n_rows, const uword n_cols, const double density)
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{
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arma_extra_debug_sigprint();
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sp_mat out;
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out.sprandu(n_rows, n_cols, density);
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return out;
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}
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arma_warn_unused
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inline
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sp_mat
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sprandu(const SizeMat& s, const double density)
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{
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arma_extra_debug_sigprint();
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sp_mat out;
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out.sprandu(s.n_rows, s.n_cols, density);
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return out;
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}
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//! Generate a sparse matrix with the non-zero values in the same locations as in the given sparse matrix X,
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//! with the non-zero values set to random values in the [0,1] interval (uniform distribution)
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template<typename T1>
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arma_warn_unused
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inline
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SpMat<typename T1::elem_type>
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sprandu(const SpBase<typename T1::elem_type, T1>& X)
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{
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arma_extra_debug_sigprint();
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typedef typename T1::elem_type eT;
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SpMat<eT> out( X.get_ref() );
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arma_rng::randu<eT>::fill( access::rwp(out.values), out.n_nonzero );
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return out;
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}
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//! @}
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