60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
/*
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* <Short Description>
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* Copyright (C) 2024 Brett Terpstra
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <assign3/neuron.h>
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#include <blt/std/random.h>
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#include <blt/iterator/iterator.h>
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#include <cmath>
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namespace assign3
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{
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neuron_t& neuron_t::randomize(blt::size_t seed)
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{
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blt::random::random_t rand{seed};
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for (auto& v : data)
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v = static_cast<Scalar>(rand.get_double(-1, 1));
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return *this;
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}
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neuron_t& neuron_t::update(const std::vector<Scalar>& new_data, const topology_function_t* basis_func, Scalar eta, Scalar r)
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{
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auto d = dist(new_data);
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for (auto& v : data)
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v = eta * basis_func->call(d, r);
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return *this;
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}
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Scalar neuron_t::dist(const std::vector<Scalar>& X) const
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{
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Scalar dist = 0;
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for (auto [v, x] : blt::zip(data, X))
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{
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auto loc = (v - x);
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dist += loc * loc;
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}
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return std::sqrt(dist);
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}
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Scalar neuron_t::distance(const neuron_t& n1, const neuron_t& n2)
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{
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auto dx = n1.x_pos - n2.x_pos;
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auto dy = n1.y_pos - n2.y_pos;
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return std::sqrt(dx * dx + dy * dy);
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}
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} |