847 lines
16 KiB
C++
847 lines
16 KiB
C++
// Copyright (C) 2008-2015 National ICT Australia (NICTA)
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// -------------------------------------------------------------------
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//
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// Written by Conrad Sanderson - http://conradsanderson.id.au
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//! \addtogroup op_max
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//! @{
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template<typename T1>
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inline
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void
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op_max::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_max>& in)
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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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const uword dim = in.aux_uword_a;
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arma_debug_check( (dim > 1), "max(): parameter 'dim' must be 0 or 1");
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const unwrap<T1> U(in.m);
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const Mat<eT>& X = U.M;
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if(&out != &X)
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{
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op_max::apply_noalias(out, X, dim);
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}
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else
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{
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Mat<eT> tmp;
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op_max::apply_noalias(tmp, X, dim);
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out.steal_mem(tmp);
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}
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}
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template<typename eT>
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inline
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void
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op_max::apply_noalias(Mat<eT>& out, const Mat<eT>& X, const uword dim, const typename arma_not_cx<eT>::result* junk)
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{
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arma_extra_debug_sigprint();
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arma_ignore(junk);
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const uword X_n_rows = X.n_rows;
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const uword X_n_cols = X.n_cols;
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if(dim == 0)
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{
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arma_extra_debug_print("op_max::apply(): dim = 0");
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out.set_size((X_n_rows > 0) ? 1 : 0, X_n_cols);
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if(X_n_rows == 0) { return; }
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eT* out_mem = out.memptr();
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for(uword col=0; col<X_n_cols; ++col)
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{
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out_mem[col] = op_max::direct_max( X.colptr(col), X_n_rows );
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}
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}
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else
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if(dim == 1)
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{
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arma_extra_debug_print("op_max::apply(): dim = 1");
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out.set_size(X_n_rows, (X_n_cols > 0) ? 1 : 0);
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if(X_n_cols == 0) { return; }
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eT* out_mem = out.memptr();
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arrayops::copy(out_mem, X.colptr(0), X_n_rows);
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for(uword col=1; col<X_n_cols; ++col)
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{
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const eT* col_mem = X.colptr(col);
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for(uword row=0; row<X_n_rows; ++row)
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{
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const eT col_val = col_mem[row];
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if(col_val > out_mem[row]) { out_mem[row] = col_val; }
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}
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}
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}
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}
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template<typename eT>
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inline
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void
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op_max::apply_noalias(Mat<eT>& out, const Mat<eT>& X, const uword dim, const typename arma_cx_only<eT>::result* junk)
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{
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arma_extra_debug_sigprint();
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arma_ignore(junk);
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const uword X_n_rows = X.n_rows;
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const uword X_n_cols = X.n_cols;
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if(dim == 0)
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{
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arma_extra_debug_print("op_max::apply(): dim = 0");
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out.set_size((X_n_rows > 0) ? 1 : 0, X_n_cols);
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if(X_n_rows == 0) { return; }
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eT* out_mem = out.memptr();
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for(uword col=0; col<X_n_cols; ++col)
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{
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out_mem[col] = op_max::direct_max( X.colptr(col), X_n_rows );
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}
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}
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else
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if(dim == 1)
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{
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arma_extra_debug_print("op_max::apply(): dim = 1");
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out.set_size(X_n_rows, (X_n_cols > 0) ? 1 : 0);
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if(X_n_cols == 0) { return; }
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eT* out_mem = out.memptr();
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for(uword row=0; row<X_n_rows; ++row)
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{
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out_mem[row] = op_max::direct_max( X, row );
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}
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}
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}
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template<typename eT>
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arma_pure
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inline
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eT
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op_max::direct_max(const eT* const X, const uword n_elem)
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{
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arma_extra_debug_sigprint();
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eT max_val = priv::most_neg<eT>();
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uword i,j;
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for(i=0, j=1; j<n_elem; i+=2, j+=2)
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{
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const eT X_i = X[i];
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const eT X_j = X[j];
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if(X_i > max_val) { max_val = X_i; }
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if(X_j > max_val) { max_val = X_j; }
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}
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if(i < n_elem)
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{
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const eT X_i = X[i];
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if(X_i > max_val) { max_val = X_i; }
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}
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return max_val;
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}
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template<typename eT>
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inline
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eT
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op_max::direct_max(const eT* const X, const uword n_elem, uword& index_of_max_val)
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{
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arma_extra_debug_sigprint();
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eT max_val = priv::most_neg<eT>();
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uword best_index = 0;
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uword i,j;
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for(i=0, j=1; j<n_elem; i+=2, j+=2)
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{
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const eT X_i = X[i];
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const eT X_j = X[j];
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if(X_i > max_val)
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{
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max_val = X_i;
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best_index = i;
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}
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if(X_j > max_val)
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{
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max_val = X_j;
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best_index = j;
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}
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}
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if(i < n_elem)
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{
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const eT X_i = X[i];
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if(X_i > max_val)
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{
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max_val = X_i;
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best_index = i;
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}
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}
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index_of_max_val = best_index;
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return max_val;
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}
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template<typename eT>
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inline
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eT
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op_max::direct_max(const Mat<eT>& X, const uword row)
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{
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arma_extra_debug_sigprint();
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const uword X_n_cols = X.n_cols;
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eT max_val = priv::most_neg<eT>();
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uword i,j;
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for(i=0, j=1; j < X_n_cols; i+=2, j+=2)
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{
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const eT tmp_i = X.at(row,i);
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const eT tmp_j = X.at(row,j);
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if(tmp_i > max_val) { max_val = tmp_i; }
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if(tmp_j > max_val) { max_val = tmp_j; }
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}
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if(i < X_n_cols)
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{
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const eT tmp_i = X.at(row,i);
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if(tmp_i > max_val) { max_val = tmp_i; }
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}
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return max_val;
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}
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template<typename eT>
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inline
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eT
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op_max::max(const subview<eT>& X)
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{
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arma_extra_debug_sigprint();
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if(X.n_elem == 0)
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{
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arma_debug_check(true, "max(): object has no elements");
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return Datum<eT>::nan;
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}
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const uword X_n_rows = X.n_rows;
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const uword X_n_cols = X.n_cols;
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eT max_val = priv::most_neg<eT>();
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if(X_n_rows == 1)
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{
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const Mat<eT>& A = X.m;
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const uword start_row = X.aux_row1;
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const uword start_col = X.aux_col1;
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const uword end_col_p1 = start_col + X_n_cols;
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uword i,j;
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for(i=start_col, j=start_col+1; j < end_col_p1; i+=2, j+=2)
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{
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const eT tmp_i = A.at(start_row, i);
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const eT tmp_j = A.at(start_row, j);
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if(tmp_i > max_val) { max_val = tmp_i; }
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if(tmp_j > max_val) { max_val = tmp_j; }
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}
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if(i < end_col_p1)
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{
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const eT tmp_i = A.at(start_row, i);
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if(tmp_i > max_val) { max_val = tmp_i; }
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}
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}
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else
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{
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for(uword col=0; col < X_n_cols; ++col)
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{
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max_val = (std::max)(max_val, op_max::direct_max(X.colptr(col), X_n_rows));
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}
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}
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return max_val;
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}
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template<typename T1>
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inline
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typename arma_not_cx<typename T1::elem_type>::result
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op_max::max(const Base<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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const Proxy<T1> P(X.get_ref());
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const uword n_elem = P.get_n_elem();
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if(n_elem == 0)
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{
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arma_debug_check(true, "max(): object has no elements");
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return Datum<eT>::nan;
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}
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eT max_val = priv::most_neg<eT>();
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if(Proxy<T1>::prefer_at_accessor == false)
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{
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typedef typename Proxy<T1>::ea_type ea_type;
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ea_type A = P.get_ea();
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uword i,j;
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for(i=0, j=1; j<n_elem; i+=2, j+=2)
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{
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const eT tmp_i = A[i];
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const eT tmp_j = A[j];
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if(tmp_i > max_val) { max_val = tmp_i; }
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if(tmp_j > max_val) { max_val = tmp_j; }
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}
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if(i < n_elem)
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{
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const eT tmp_i = A[i];
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if(tmp_i > max_val) { max_val = tmp_i; }
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}
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}
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else
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{
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const uword n_rows = P.get_n_rows();
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const uword n_cols = P.get_n_cols();
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if(n_rows == 1)
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{
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uword i,j;
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for(i=0, j=1; j < n_cols; i+=2, j+=2)
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{
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const eT tmp_i = P.at(0,i);
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const eT tmp_j = P.at(0,j);
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if(tmp_i > max_val) { max_val = tmp_i; }
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if(tmp_j > max_val) { max_val = tmp_j; }
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}
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if(i < n_cols)
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{
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const eT tmp_i = P.at(0,i);
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if(tmp_i > max_val) { max_val = tmp_i; }
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}
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}
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else
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{
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for(uword col=0; col < n_cols; ++col)
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{
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uword i,j;
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for(i=0, j=1; j < n_rows; i+=2, j+=2)
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{
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const eT tmp_i = P.at(i,col);
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const eT tmp_j = P.at(j,col);
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if(tmp_i > max_val) { max_val = tmp_i; }
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if(tmp_j > max_val) { max_val = tmp_j; }
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}
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if(i < n_rows)
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{
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const eT tmp_i = P.at(i,col);
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if(tmp_i > max_val) { max_val = tmp_i; }
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}
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}
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}
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}
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return max_val;
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}
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template<typename T1>
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inline
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typename arma_not_cx<typename T1::elem_type>::result
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op_max::max_with_index(const Proxy<T1>& P, uword& index_of_max_val)
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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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const uword n_elem = P.get_n_elem();
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if(n_elem == 0)
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{
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arma_debug_check(true, "max(): object has no elements");
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return Datum<eT>::nan;
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}
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eT best_val = priv::most_neg<eT>();
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uword best_index = 0;
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if(Proxy<T1>::prefer_at_accessor == false)
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{
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typedef typename Proxy<T1>::ea_type ea_type;
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ea_type A = P.get_ea();
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for(uword i=0; i<n_elem; ++i)
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{
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const eT tmp = A[i];
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if(tmp > best_val) { best_val = tmp; best_index = i; }
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}
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}
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else
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{
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const uword n_rows = P.get_n_rows();
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const uword n_cols = P.get_n_cols();
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if(n_rows == 1)
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{
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for(uword i=0; i < n_cols; ++i)
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{
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const eT tmp = P.at(0,i);
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if(tmp > best_val) { best_val = tmp; best_index = i; }
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}
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}
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else
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if(n_cols == 1)
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{
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for(uword i=0; i < n_rows; ++i)
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{
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const eT tmp = P.at(i,0);
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if(tmp > best_val) { best_val = tmp; best_index = i; }
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}
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}
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else
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{
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uword count = 0;
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for(uword col=0; col < n_cols; ++col)
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for(uword row=0; row < n_rows; ++row)
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{
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const eT tmp = P.at(row,col);
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if(tmp > best_val) { best_val = tmp; best_index = count; }
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++count;
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}
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}
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}
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index_of_max_val = best_index;
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return best_val;
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}
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template<typename T>
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inline
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std::complex<T>
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op_max::direct_max(const std::complex<T>* const X, const uword n_elem)
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{
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arma_extra_debug_sigprint();
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uword index = 0;
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T max_val = priv::most_neg<T>();
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for(uword i=0; i<n_elem; ++i)
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{
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const T tmp_val = std::abs(X[i]);
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if(tmp_val > max_val)
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{
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max_val = tmp_val;
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index = i;
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}
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}
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return X[index];
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}
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template<typename T>
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inline
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std::complex<T>
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op_max::direct_max(const std::complex<T>* const X, const uword n_elem, uword& index_of_max_val)
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{
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arma_extra_debug_sigprint();
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uword index = 0;
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T max_val = priv::most_neg<T>();
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for(uword i=0; i<n_elem; ++i)
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{
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const T tmp_val = std::abs(X[i]);
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if(tmp_val > max_val)
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{
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max_val = tmp_val;
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index = i;
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}
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}
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index_of_max_val = index;
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return X[index];
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}
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template<typename T>
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inline
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std::complex<T>
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op_max::direct_max(const Mat< std::complex<T> >& X, const uword row)
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{
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arma_extra_debug_sigprint();
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const uword X_n_cols = X.n_cols;
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uword index = 0;
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T max_val = priv::most_neg<T>();
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for(uword col=0; col<X_n_cols; ++col)
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{
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const T tmp_val = std::abs(X.at(row,col));
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if(tmp_val > max_val)
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{
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max_val = tmp_val;
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index = col;
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}
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}
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return X.at(row,index);
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}
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template<typename T>
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inline
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std::complex<T>
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op_max::max(const subview< std::complex<T> >& X)
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{
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arma_extra_debug_sigprint();
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typedef typename std::complex<T> eT;
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if(X.n_elem == 0)
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{
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arma_debug_check(true, "max(): object has no elements");
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return Datum<eT>::nan;
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}
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const Mat<eT>& A = X.m;
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const uword X_n_rows = X.n_rows;
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const uword X_n_cols = X.n_cols;
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const uword start_row = X.aux_row1;
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const uword start_col = X.aux_col1;
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const uword end_row_p1 = start_row + X_n_rows;
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const uword end_col_p1 = start_col + X_n_cols;
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T max_val = priv::most_neg<T>();
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uword best_row = 0;
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uword best_col = 0;
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if(X_n_rows == 1)
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{
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best_col = 0;
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for(uword col=start_col; col < end_col_p1; ++col)
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{
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const T tmp_val = std::abs( A.at(start_row, col) );
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if(tmp_val > max_val)
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{
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max_val = tmp_val;
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best_col = col;
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}
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}
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best_row = start_row;
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}
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else
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{
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for(uword col=start_col; col < end_col_p1; ++col)
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for(uword row=start_row; row < end_row_p1; ++row)
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{
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const T tmp_val = std::abs( A.at(row, col) );
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if(tmp_val > max_val)
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{
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max_val = tmp_val;
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best_row = row;
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best_col = col;
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}
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}
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}
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return A.at(best_row, best_col);
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}
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template<typename T1>
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inline
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typename arma_cx_only<typename T1::elem_type>::result
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op_max::max(const Base<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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typedef typename get_pod_type<eT>::result T;
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const Proxy<T1> P(X.get_ref());
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const uword n_elem = P.get_n_elem();
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if(n_elem == 0)
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{
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arma_debug_check(true, "max(): object has no elements");
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return Datum<eT>::nan;
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}
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T max_val = priv::most_neg<T>();
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if(Proxy<T1>::prefer_at_accessor == false)
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{
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typedef typename Proxy<T1>::ea_type ea_type;
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ea_type A = P.get_ea();
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uword index = 0;
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for(uword i=0; i<n_elem; ++i)
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{
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const T tmp = std::abs(A[i]);
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if(tmp > max_val)
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{
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max_val = tmp;
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index = i;
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}
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}
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return( A[index] );
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}
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else
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{
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const uword n_rows = P.get_n_rows();
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const uword n_cols = P.get_n_cols();
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uword best_row = 0;
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uword best_col = 0;
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if(n_rows == 1)
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{
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for(uword col=0; col < n_cols; ++col)
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{
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const T tmp = std::abs(P.at(0,col));
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if(tmp > max_val)
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{
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max_val = tmp;
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best_col = col;
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}
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}
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}
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else
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{
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for(uword col=0; col < n_cols; ++col)
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for(uword row=0; row < n_rows; ++row)
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{
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const T tmp = std::abs(P.at(row,col));
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if(tmp > max_val)
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{
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max_val = tmp;
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best_row = row;
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best_col = col;
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}
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}
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}
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return P.at(best_row, best_col);
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}
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}
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template<typename T1>
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inline
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|
typename arma_cx_only<typename T1::elem_type>::result
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op_max::max_with_index(const Proxy<T1>& P, uword& index_of_max_val)
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|
{
|
|
arma_extra_debug_sigprint();
|
|
|
|
typedef typename T1::elem_type eT;
|
|
typedef typename get_pod_type<eT>::result T;
|
|
|
|
const uword n_elem = P.get_n_elem();
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|
|
|
if(n_elem == 0)
|
|
{
|
|
arma_debug_check(true, "max(): object has no elements");
|
|
|
|
return Datum<eT>::nan;
|
|
}
|
|
|
|
T best_val = priv::most_neg<T>();
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|
|
|
if(Proxy<T1>::prefer_at_accessor == false)
|
|
{
|
|
typedef typename Proxy<T1>::ea_type ea_type;
|
|
|
|
ea_type A = P.get_ea();
|
|
|
|
uword best_index = 0;
|
|
|
|
for(uword i=0; i<n_elem; ++i)
|
|
{
|
|
const T tmp = std::abs(A[i]);
|
|
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|
if(tmp > best_val) { best_val = tmp; best_index = i; }
|
|
}
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|
index_of_max_val = best_index;
|
|
|
|
return( A[best_index] );
|
|
}
|
|
else
|
|
{
|
|
const uword n_rows = P.get_n_rows();
|
|
const uword n_cols = P.get_n_cols();
|
|
|
|
uword best_row = 0;
|
|
uword best_col = 0;
|
|
uword best_index = 0;
|
|
|
|
if(n_rows == 1)
|
|
{
|
|
for(uword col=0; col < n_cols; ++col)
|
|
{
|
|
const T tmp = std::abs(P.at(0,col));
|
|
|
|
if(tmp > best_val) { best_val = tmp; best_col = col; }
|
|
}
|
|
|
|
best_index = best_col;
|
|
}
|
|
else
|
|
if(n_cols == 1)
|
|
{
|
|
for(uword row=0; row < n_rows; ++row)
|
|
{
|
|
const T tmp = std::abs(P.at(row,0));
|
|
|
|
if(tmp > best_val) { best_val = tmp; best_row = row; }
|
|
}
|
|
|
|
best_index = best_row;
|
|
}
|
|
else
|
|
{
|
|
uword count = 0;
|
|
|
|
for(uword col=0; col < n_cols; ++col)
|
|
for(uword row=0; row < n_rows; ++row)
|
|
{
|
|
const T tmp = std::abs(P.at(row,col));
|
|
|
|
if(tmp > best_val)
|
|
{
|
|
best_val = tmp;
|
|
|
|
best_row = row;
|
|
best_col = col;
|
|
|
|
best_index = count;
|
|
}
|
|
|
|
++count;
|
|
}
|
|
}
|
|
|
|
index_of_max_val = best_index;
|
|
|
|
return P.at(best_row, best_col);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
//! @}
|