2020
10-07
10-07
python编写softmax函数、交叉熵函数实例
python代码如下:importnumpyasnp#Writeafunctionthattakesasinputalistofnumbers,andreturns#thelistofvaluesgivenbythesoftmaxfunction.defsoftmax(L):passexpL=np.exp(L)sumExpL=sum(expL)result=[]foriinexpL:result.append(i*1.0/sumExpL)returnresultpython编写交叉熵公式:importnumpyasnpdefcross_entropy(Y,P):Y=np.float_(Y)P=np.float_(P)return-np.sum(Y...
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