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