358 lines
7.5 KiB
C++
358 lines
7.5 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_randu
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//! @{
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// scalars
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arma_warn_unused
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inline
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double
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randu()
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{
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arma_debug_sigprint();
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return double(arma_rng::randu<double>());
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}
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template<typename eT>
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arma_warn_unused
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inline
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typename arma_real_or_cx_only<eT>::result
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randu()
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{
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arma_debug_sigprint();
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return eT(arma_rng::randu<eT>());
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}
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arma_warn_unused
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inline
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double
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randu(const distr_param& param)
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{
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arma_debug_sigprint();
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if(param.state == 0) { return double(arma_rng::randu<double>()); }
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double a = double(0);
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double b = double(1);
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param.get_double_vals(a,b);
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arma_conform_check( (a >= b), "randu(): incorrect distribution parameters; a must be less than b" );
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const double val = double(arma_rng::randu<double>());
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return ((val * (b - a)) + a);
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}
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template<typename eT>
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arma_warn_unused
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inline
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typename arma_real_or_cx_only<eT>::result
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randu(const distr_param& param)
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{
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arma_debug_sigprint();
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if(param.state == 0) { return eT(arma_rng::randu<eT>()); }
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double a = double(0);
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double b = double(1);
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param.get_double_vals(a,b);
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arma_conform_check( (a >= b), "randu(): incorrect distribution parameters; a must be less than b" );
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eT val = eT(0);
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arma_rng::randu<eT>::fill(&val, 1, a, b); // using fill() as eT can be complex
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return val;
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}
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// vectors
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arma_warn_unused
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inline
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vec
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randu(const uword n_elem, const distr_param& param = distr_param())
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{
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arma_debug_sigprint();
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vec out(n_elem, arma_nozeros_indicator());
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if(param.state == 0)
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{
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arma_rng::randu<double>::fill(out.memptr(), n_elem);
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}
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else
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{
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double a = double(0);
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double b = double(1);
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param.get_double_vals(a,b);
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arma_conform_check( (a >= b), "randu(): incorrect distribution parameters; a must be less than b" );
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arma_rng::randu<double>::fill(out.memptr(), n_elem, a, b);
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}
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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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randu(const uword n_elem, const distr_param& param = distr_param(), const typename arma_Mat_Col_Row_only<obj_type>::result* junk = nullptr)
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{
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arma_debug_sigprint();
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arma_ignore(junk);
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typedef typename obj_type::elem_type eT;
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const uword n_rows = (is_Row<obj_type>::value) ? uword(1) : n_elem;
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const uword n_cols = (is_Row<obj_type>::value) ? n_elem : uword(1);
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obj_type out(n_rows, n_cols, arma_nozeros_indicator());
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if(param.state == 0)
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{
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arma_rng::randu<eT>::fill(out.memptr(), out.n_elem);
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}
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else
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{
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double a = double(0);
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double b = double(1);
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param.get_double_vals(a,b);
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arma_conform_check( (a >= b), "randu(): incorrect distribution parameters; a must be less than b" );
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arma_rng::randu<eT>::fill(out.memptr(), out.n_elem, a, b);
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}
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return out;
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}
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// matrices
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arma_warn_unused
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inline
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mat
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randu(const uword n_rows, const uword n_cols, const distr_param& param = distr_param())
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{
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arma_debug_sigprint();
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mat out(n_rows, n_cols, arma_nozeros_indicator());
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if(param.state == 0)
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{
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arma_rng::randu<double>::fill(out.memptr(), out.n_elem);
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}
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else
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{
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double a = double(0);
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double b = double(1);
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param.get_double_vals(a,b);
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arma_conform_check( (a >= b), "randu(): incorrect distribution parameters; a must be less than b" );
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arma_rng::randu<double>::fill(out.memptr(), out.n_elem, a, b);
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}
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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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mat
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randu(const SizeMat& s, const distr_param& param = distr_param())
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{
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arma_debug_sigprint();
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return randu(s.n_rows, s.n_cols, param);
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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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randu(const uword n_rows, const uword n_cols, const distr_param& param = distr_param(), const typename arma_Mat_Col_Row_only<obj_type>::result* junk = nullptr)
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{
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arma_debug_sigprint();
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arma_ignore(junk);
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typedef typename obj_type::elem_type eT;
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if(is_Col<obj_type>::value) { arma_conform_check( (n_cols != 1), "randu(): incompatible size" ); }
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if(is_Row<obj_type>::value) { arma_conform_check( (n_rows != 1), "randu(): incompatible size" ); }
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obj_type out(n_rows, n_cols, arma_nozeros_indicator());
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if(param.state == 0)
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{
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arma_rng::randu<eT>::fill(out.memptr(), out.n_elem);
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}
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else
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{
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double a = double(0);
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double b = double(1);
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param.get_double_vals(a,b);
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arma_conform_check( (a >= b), "randu(): incorrect distribution parameters; a must be less than b" );
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arma_rng::randu<eT>::fill(out.memptr(), out.n_elem, a, b);
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}
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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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randu(const SizeMat& s, const distr_param& param = distr_param(), const typename arma_Mat_Col_Row_only<obj_type>::result* junk = nullptr)
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{
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arma_debug_sigprint();
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arma_ignore(junk);
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return randu<obj_type>(s.n_rows, s.n_cols, param);
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}
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// cubes
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arma_warn_unused
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inline
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cube
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randu(const uword n_rows, const uword n_cols, const uword n_slices, const distr_param& param = distr_param())
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{
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arma_debug_sigprint();
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cube out(n_rows, n_cols, n_slices, arma_nozeros_indicator());
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if(param.state == 0)
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{
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arma_rng::randu<double>::fill(out.memptr(), out.n_elem);
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}
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else
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{
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double a = double(0);
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double b = double(1);
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param.get_double_vals(a,b);
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arma_conform_check( (a >= b), "randu(): incorrect distribution parameters; a must be less than b" );
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arma_rng::randu<double>::fill(out.memptr(), out.n_elem, a, b);
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}
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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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cube
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randu(const SizeCube& s, const distr_param& param = distr_param())
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{
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arma_debug_sigprint();
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return randu(s.n_rows, s.n_cols, s.n_slices, param);
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}
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template<typename cube_type>
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arma_warn_unused
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inline
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cube_type
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randu(const uword n_rows, const uword n_cols, const uword n_slices, const distr_param& param = distr_param(), const typename arma_Cube_only<cube_type>::result* junk = nullptr)
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{
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arma_debug_sigprint();
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arma_ignore(junk);
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typedef typename cube_type::elem_type eT;
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cube_type out(n_rows, n_cols, n_slices, arma_nozeros_indicator());
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if(param.state == 0)
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{
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arma_rng::randu<eT>::fill(out.memptr(), out.n_elem);
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}
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else
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{
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double a = double(0);
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double b = double(1);
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param.get_double_vals(a,b);
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arma_conform_check( (a >= b), "randu(): incorrect distribution parameters; a must be less than b" );
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arma_rng::randu<eT>::fill(out.memptr(), out.n_elem, a, b);
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}
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return out;
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}
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template<typename cube_type>
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arma_warn_unused
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inline
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cube_type
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randu(const SizeCube& s, const distr_param& param = distr_param(), const typename arma_Cube_only<cube_type>::result* junk = nullptr)
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{
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arma_debug_sigprint();
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arma_ignore(junk);
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return randu<cube_type>(s.n_rows, s.n_cols, s.n_slices, param);
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}
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//! @}
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