1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef LIBTEXTCLASSIFIER_UTILS_MATH_SOFTMAX_H_ 18 #define LIBTEXTCLASSIFIER_UTILS_MATH_SOFTMAX_H_ 19 20 #include <vector> 21 22 namespace libtextclassifier3 { 23 24 // Computes probability of a softmax label. Parameter "scores" is the vector of 25 // softmax logits. Returns 0.0f if "label" is outside the range [0, 26 // scores.size()). 27 float ComputeSoftmaxProbability(const std::vector<float> &scores, int label); 28 29 // Computes and returns a softmax for a given vector of floats. Parameter 30 // "scores" is the vector of softmax logits. 31 std::vector<float> ComputeSoftmax(const std::vector<float> &scores); 32 33 // Same as above but operates on an array of floats. 34 std::vector<float> ComputeSoftmax(const float *scores, int scores_size); 35 36 } // namespace libtextclassifier3 37 38 #endif // LIBTEXTCLASSIFIER_UTILS_MATH_SOFTMAX_H_ 39
