NN(3Layer)\ex4data1.mat ..........\fmincg.m ..........\nnCostFunction.m ..........\predict.m ..........\randInitializeWeights.m ..........\shuju.mat ..........\sigmoid.m ..........\sigmoidGradient.m ..........\sysj2.mat ..........\test.m ..........\test.mat ..........\test1.mat NN(3Layer)