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xerus
Commit 15bca0b0 authored by Ben Huber's avatar Ben Huber
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include/xerus/algorithms/crossApproximation.h deleted 100644 → 0
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// Xerus - A General Purpose Tensor Library
// Copyright (C) 2014-2017 Benjamin Huber and Sebastian Wolf.
//
// Xerus is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// Xerus is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with Xerus. If not, see <http://www.gnu.org/licenses/>.
//
// For further information on Xerus visit https://libXerus.org
// or contact us at contact@libXerus.org.
/**
* @file
* @brief Header file for the cross approximation algorithm and its variants.
*/
#pragma once
#include "../ttNetwork.h"
#include "../performanceData.h"
#include "../measurments.h"
namespace xerus {
// TTTensor cross_approximation(const Tensor& _input, const std::vector<size_t> &_ranks);
}
src/xerus/algorithms/crossApproximation.cpp deleted 100644 → 0
View file @ d7941c88
// Xerus - A General Purpose Tensor Library
// Copyright (C) 2014-2017 Benjamin Huber and Sebastian Wolf.
//
// Xerus is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// Xerus is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with Xerus. If not, see <http://www.gnu.org/licenses/>.
//
// For further information on Xerus visit https://libXerus.org
// or contact us at contact@libXerus.org.
/**
* @file
* @brief Implementation of the ALS variants.
*/
#include <xerus/algorithms/als.h>
#include <xerus/basic.h>
#include <xerus/tensorNetwork.h>
#include <xerus/indexedTensor_tensor_factorisations.h>
namespace xerus {
///@brief Creates a set of @a _num unique random index tuples, using the @a _dimensions starting at @a _position +1.
// std::vector<std::vector<size_t>> create_random_tuples(const std::vector<size_t>& _dimensions, const size_t _position, const size_t _num) {
// const size_t N = _dimensions.size()-_position;
//
// std::mt19937_64 rnd(rd());
// std::vector<std::uniform_int_distribution<size_t>> dists;
// for(size_t d = 0; d < N; ++d) {
// dists.emplace_back(0, _dimensions[_position+d]);
// }
//
// std::vector<std::vector<size_t>> tuples(_num, std::vector<size_t>(N, 0));
//
// for(size_t i = 0; i < _num; ++i) {
// // Create a random tuple.
// for(size_t d = 0; d < N; ++d) {
// tuples[i][d] = dists[d](rnd);
// }
//
// // Redo this one if it is non unique.
// for(size_t j = 0; j < i; ++j) {
// if(tuples[i] == tuples[j]) { --i; break; }
// }
// }
//
// return tuples;
// }
//
// TTTensor cross_approximation(const Tensor& _input, const std::vector<size_t> &_ranks) {
// std::mt19937_64 rnd(rd());
//
// TTTensor reconstruction(_input.dimensions.size());
//
//
// std::vector<std::vector<size_t>> leftTuples;
//
// reconstruction.set_component(0, Tensor({1, _input.dimensions[0], _ranks[0]}, Tensor::Representation::Dense, Tensor::Initialisation::None));
// std::vector<std::vector<size_t>> tuples = create_random_tuples(_input.dimensions, 0, _ranks[0]);
//
// for(size_t i = 0; i < _input.dimensions[0]; ++i) {
// for(size_t j = 0; j < tuples.size(); ++j) {
// std::vector<size_t> index(1, i);
// index.insert(index.end(), tuples[j].begin(), tuples[j].end());
// reconstruction.component(0)[{0,i,j}] = _input[index];
// }
// }
//
// std::uniform_int_distribution<size_t> dist(0, _input.dimensions[0]);
//
// for(size_t i = 0; i < _ranks[0]; ++i) {
// leftTuples.emplace_back(dist(rnd));
// }
//
// for(size_t position = 0; position < _input.degree()-1; ++position) {
// // std::vector<std::vector<size_t>> tuples = create_random_tuples(_input.dimensions, position, _ranks[position]);
//
// // reconstruction.set_component(position, Tensor({_ranks[position-1], _input.dimensions[position], _ranks[position]}, Tensor::Initialisation::None));
// }
//
// return reconstruction;
// }
} // namespace xerus
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