tanh.java

bp神经网络的java程序

package structure;
/**
 * 双曲正切激活函数
 * */
public class Tanh extends Function{
	double getVal(double x){
    	//return((1-Math.exp(-x))/(1+Math.exp(-x)));
    	return (2/(1+Math.exp(-x)))-1;
    }
}