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Diffstat (limited to 'src/armadillo/include/armadillo_bits/operator_div.hpp')
| -rw-r--r-- | src/armadillo/include/armadillo_bits/operator_div.hpp | 382 |
1 files changed, 382 insertions, 0 deletions
diff --git a/src/armadillo/include/armadillo_bits/operator_div.hpp b/src/armadillo/include/armadillo_bits/operator_div.hpp new file mode 100644 index 0000000..4f17fdf --- /dev/null +++ b/src/armadillo/include/armadillo_bits/operator_div.hpp @@ -0,0 +1,382 @@ +// 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 operator_div +//! @{ + + + +//! Base / scalar +template<typename T1> +arma_inline +typename +enable_if2< is_arma_type<T1>::value, const eOp< T1, eop_scalar_div_post> >::result +operator/ + ( + const T1& X, + const typename T1::elem_type k + ) + { + arma_extra_debug_sigprint(); + + return eOp<T1, eop_scalar_div_post>(X, k); + } + + + +//! scalar / Base +template<typename T1> +arma_inline +typename +enable_if2< is_arma_type<T1>::value, const eOp< T1, eop_scalar_div_pre> >::result +operator/ + ( + const typename T1::elem_type k, + const T1& X + ) + { + arma_extra_debug_sigprint(); + + return eOp<T1, eop_scalar_div_pre>(X, k); + } + + + +//! complex scalar / non-complex Base +template<typename T1> +arma_inline +typename +enable_if2 + < + (is_arma_type<T1>::value && is_cx<typename T1::elem_type>::no), + const mtOp<typename std::complex<typename T1::pod_type>, T1, op_cx_scalar_div_pre> + >::result +operator/ + ( + const std::complex<typename T1::pod_type>& k, + const T1& X + ) + { + arma_extra_debug_sigprint(); + + return mtOp<typename std::complex<typename T1::pod_type>, T1, op_cx_scalar_div_pre>('j', X, k); + } + + + +//! non-complex Base / complex scalar +template<typename T1> +arma_inline +typename +enable_if2 + < + (is_arma_type<T1>::value && is_cx<typename T1::elem_type>::no), + const mtOp<typename std::complex<typename T1::pod_type>, T1, op_cx_scalar_div_post> + >::result +operator/ + ( + const T1& X, + const std::complex<typename T1::pod_type>& k + ) + { + arma_extra_debug_sigprint(); + + return mtOp<typename std::complex<typename T1::pod_type>, T1, op_cx_scalar_div_post>('j', X, k); + } + + + +//! element-wise division of Base objects with same element type +template<typename T1, typename T2> +arma_inline +typename +enable_if2 + < + (is_arma_type<T1>::value && is_arma_type<T2>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value), + const eGlue<T1, T2, eglue_div> + >::result +operator/ + ( + const T1& X, + const T2& Y + ) + { + arma_extra_debug_sigprint(); + + return eGlue<T1, T2, eglue_div>(X, Y); + } + + + +//! element-wise division of Base objects with different element types +template<typename T1, typename T2> +inline +typename +enable_if2 + < + (is_arma_type<T1>::value && is_arma_type<T2>::value && (is_same_type<typename T1::elem_type, typename T2::elem_type>::no)), + const mtGlue<typename promote_type<typename T1::elem_type, typename T2::elem_type>::result, T1, T2, glue_mixed_div> + >::result +operator/ + ( + const T1& X, + const T2& Y + ) + { + arma_extra_debug_sigprint(); + + typedef typename T1::elem_type eT1; + typedef typename T2::elem_type eT2; + + typedef typename promote_type<eT1,eT2>::result out_eT; + + promote_type<eT1,eT2>::check(); + + return mtGlue<out_eT, T1, T2, glue_mixed_div>( X, Y ); + } + + + +//! element-wise division of sparse matrix by scalar +template<typename T1> +inline +typename +enable_if2< is_arma_sparse_type<T1>::value, SpMat<typename T1::elem_type> >::result +operator/ + ( + const T1& X, + const typename T1::elem_type y + ) + { + arma_extra_debug_sigprint(); + + SpMat<typename T1::elem_type> result(X); + + result /= y; + + return result; + } + + + +//! element-wise division of one sparse and one dense object +template<typename T1, typename T2> +inline +typename +enable_if2 + < + (is_arma_sparse_type<T1>::value && is_arma_type<T2>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value), + SpMat<typename T1::elem_type> + >::result +operator/ + ( + const T1& x, + const T2& y + ) + { + arma_extra_debug_sigprint(); + + typedef typename T1::elem_type eT; + + const SpProxy<T1> pa(x); + const Proxy<T2> pb(y); + + const uword n_rows = pa.get_n_rows(); + const uword n_cols = pa.get_n_cols(); + + arma_debug_assert_same_size(n_rows, n_cols, pb.get_n_rows(), pb.get_n_cols(), "element-wise division"); + + uword new_n_nonzero = 0; + + for(uword col=0; col < n_cols; ++col) + for(uword row=0; row < n_rows; ++row) + { + const eT val = pa.at(row,col) / pb.at(row, col); + + if(val != eT(0)) + { + ++new_n_nonzero; + } + } + + SpMat<eT> result(arma_reserve_indicator(), n_rows, n_cols, new_n_nonzero); + + uword cur_pos = 0; + + for(uword col=0; col < n_cols; ++col) + for(uword row=0; row < n_rows; ++row) + { + const eT val = pa.at(row,col) / pb.at(row, col); + + if(val != eT(0)) + { + access::rw(result.values[cur_pos]) = val; + access::rw(result.row_indices[cur_pos]) = row; + ++access::rw(result.col_ptrs[col + 1]); + ++cur_pos; + } + } + + // Fix column pointers + for(uword col = 1; col <= result.n_cols; ++col) + { + access::rw(result.col_ptrs[col]) += result.col_ptrs[col - 1]; + } + + return result; + } + + + +//! optimization: element-wise division of sparse / (sparse +/- scalar) +template<typename T1, typename T2, typename op_type> +inline +typename +enable_if2 + < + ( + is_arma_sparse_type<T1>::value && is_arma_sparse_type<T2>::value && + is_same_type<typename T1::elem_type, typename T2::elem_type>::yes && + (is_same_type<op_type, op_sp_plus>::value || + is_same_type<op_type, op_sp_minus_pre>::value || + is_same_type<op_type, op_sp_minus_post>::value) + ), + SpMat<typename T1::elem_type> + >::result +operator/ + ( + const T1& x, + const SpToDOp<T2, op_type>& y + ) + { + arma_extra_debug_sigprint(); + + SpMat<typename T1::elem_type> out; + + op_type::apply_inside_div(out, x, y); + + return out; + } + + + +//! element-wise division of one dense and one sparse object +template<typename T1, typename T2> +inline +typename +enable_if2 + < + (is_arma_type<T1>::value && is_arma_sparse_type<T2>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value), + Mat<typename T1::elem_type> + >::result +operator/ + ( + const T1& x, + const T2& y + ) + { + arma_extra_debug_sigprint(); + + typedef typename T1::elem_type eT; + + const Proxy<T1> pa(x); + const SpProxy<T2> pb(y); + + const uword n_rows = pa.get_n_rows(); + const uword n_cols = pa.get_n_cols(); + + arma_debug_assert_same_size(n_rows, n_cols, pb.get_n_rows(), pb.get_n_cols(), "element-wise division"); + + Mat<eT> result(n_rows, n_cols, arma_nozeros_indicator()); + + for(uword col=0; col < n_cols; ++col) + for(uword row=0; row < n_rows; ++row) + { + result.at(row, col) = pa.at(row, col) / pb.at(row, col); + } + + return result; + } + + + +template<typename parent, unsigned int mode, typename T2> +arma_inline +Mat<typename parent::elem_type> +operator/ + ( + const subview_each1<parent,mode>& X, + const Base<typename parent::elem_type,T2>& Y + ) + { + arma_extra_debug_sigprint(); + + return subview_each1_aux::operator_div(X, Y.get_ref()); + } + + + +template<typename T1, typename parent, unsigned int mode> +arma_inline +Mat<typename parent::elem_type> +operator/ + ( + const Base<typename parent::elem_type,T1>& X, + const subview_each1<parent,mode>& Y + ) + { + arma_extra_debug_sigprint(); + + return subview_each1_aux::operator_div(X.get_ref(), Y); + } + + + +template<typename parent, unsigned int mode, typename TB, typename T2> +arma_inline +Mat<typename parent::elem_type> +operator/ + ( + const subview_each2<parent,mode,TB>& X, + const Base<typename parent::elem_type,T2>& Y + ) + { + arma_extra_debug_sigprint(); + + return subview_each2_aux::operator_div(X, Y.get_ref()); + } + + + +template<typename T1, typename parent, unsigned int mode, typename TB> +arma_inline +Mat<typename parent::elem_type> +operator/ + ( + const Base<typename parent::elem_type,T1>& X, + const subview_each2<parent,mode,TB>& Y + ) + { + arma_extra_debug_sigprint(); + + return subview_each2_aux::operator_div(X.get_ref(), Y); + } + + + +//! @} |