Neural Network Output

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I am trying to use neural network tool to train data. I selected time series tools (NARX) with 1 neuron and 1 delay. I found the net.IW {1,1} as 0.0119 -0.0110. But when I try to test this with my test data (manually) I am not getting near to the target values. Can anybody please explain how can I use these 0.0119 -0.0110 values with the test data to get the output?

Many Thanks T

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Thamo Sutharssan 2012-2-29

I used to find the output using following equations ...

z(t) = 0.0119*x(t-1)-0.011*y(t-1)

y(t) = 1/(1+exp(-z(t)))

But I am not getting the target values.

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Answer 1

Greg Heath 2012-3-4

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Typically, the inability to match net output with mathematical caalculations involves the default MAPMINMAX normalization.

Hope this helps.

Greg

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Thamo Sutharssan 2012-3-9

Which stage I have to apply MAPMINMAX normalization? Sorry I still do not get it? I use the MAPMINMAX normalization to my final output.

Greg Heath 2012-3-14

See the documentation for whatever net you are using w.r.t.

default actions of which you may not be aware.

Hope this helps.

Greg

Neural Network Output

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