60 lines
2.2 KiB
C++
60 lines
2.2 KiB
C++
/*
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* Copyright (c) 2017-2018 Arm Limited.
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*
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "MeanStdDev.h"
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namespace arm_compute
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{
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namespace test
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{
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namespace validation
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{
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namespace reference
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{
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template <typename T>
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std::pair<float, float> mean_and_standard_deviation(const SimpleTensor<T> &in)
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{
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const int num_elements = in.num_elements();
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// Calculate mean
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float mean = std::accumulate(in.data(), in.data() + num_elements, 0.f) / num_elements;
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// Calculate standard deviation
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float std_dev = std::accumulate(in.data(), in.data() + num_elements, 0.f, [&mean](float a, float b)
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{
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return a + (mean - b) * (mean - b);
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});
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std_dev = std::sqrt(std_dev / num_elements);
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return std::make_pair(mean, std_dev);
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}
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template std::pair<float, float> mean_and_standard_deviation(const SimpleTensor<uint8_t> &in);
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template std::pair<float, float> mean_and_standard_deviation(const SimpleTensor<half> &in);
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template std::pair<float, float> mean_and_standard_deviation(const SimpleTensor<float> &in);
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} // namespace reference
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} // namespace validation
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} // namespace test
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} // namespace arm_compute
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