原文：一个简单的matlab程序告诉你学习速率对于BP神经网络收敛的影响

function test_easy_script x = [0,0,1;0,1,1;1,0,1;1,1,1]; y = [0,1,1,0]'; for power = 1:5 alpha = 10^(-3+power) %Output of function rand() in area (0,1) with mean = 0.5 distribution %Do the operation to make sure the mean = 0 syn0 = 2*rand(3,4)-1; syn1 = 2*rand(4,1)-1; %Training the network for i = 1:60000 l0 = x; l1 = sigmoid(x*syn0); l2 = sigmoid(l1*syn1);