/*
libcudann
Copyright (C) 2011 Luca Donati (lucadonati85@gmail.com)
*/
/*
* ErrorFunctions.cpp
*
* Created on: Dec 22, 2010
* Author: donati
*/
#include "ErrorFunctions.h"
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
//returns the new error after the application of a function (tanh is more aggressive error targeting)
float errorFunction(float error, int func){
switch(func){
case ERROR_TANH: if (error < -.9999999) return -17.0;
else if (error > .9999999) return 17.0;
else return log((1.0 + error) / (1.0 - error));
case ERROR_LINEAR: return error;
default: printf("FUNCTION NOT IMPLEMENTED YET\n");exit(1);
}
}