51 lines
1.2 KiB
C++
51 lines
1.2 KiB
C++
#pragma once
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#include <string>
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namespace NeuralNetwork {
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namespace ActivationFunction {
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/**
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* @author Tomas Cernik (Tom.Cernik@gmail.com)
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* @brief Abstract class of activation function
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*/
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class ActivationFunction {
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public:
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virtual ~ActivationFunction() {}
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/**
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* @brief Returns derivation of output, it is slower than version with output as it needs to compute output
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* @param input is input of function
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*/
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inline float derivatedOutput(const float &input) const {
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return derivatedOutput(input,operator()(input));
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};
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/**
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* @brief Returns derivation of output
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* @param input is input of function
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* @param output is output of function
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* @see derivatedOutput
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*/
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virtual float derivatedOutput(const float &input, const float &output) const=0;
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/**
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* @brief Returns value of output
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* @param x is input of function
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*/
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virtual float operator()(const float &x) const=0;
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/**
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* @brief Function returns clone of object
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*/
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virtual ActivationFunction* clone() const = 0;
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/**
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* @brief This is a virtual function for storing Activation function
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* @returns json describing function
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*/
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virtual std::string stringify() const =0;
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};
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}
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} |