Target values for Neural Network

[TheTrees]

After I initialize the values for my NN, I want to be able to train it with a given output and a desired 'target' output. And, I can get this to work if I make my 'target' values are smallish, like less than 10. For example:

input_values = [9 8 7 6 5 4 3 2 1 0];
target_values = [0 1 2 3 4 5 6 7 8 9];

net = train(net, input_values, target_values);
sim(net, 2) % gives the result of 7

But, if I change the input and target values to bigger numbers like:

input_values = [100 200 300];
output_values = [100 200 300];

sim(net, 100) % gives the result of 200, no matter the input

Then it converges to 200, and I do not understand why this is? Why would it only work with smaller numbers? Maybe it doesn't work at all, and I just got lucky with my smaller example?

Thanks for any help or suggestions!

 

[IRstuff]

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