Why Neural Network's output reduce 2 samples?

If I input N samples as target after learning process it produces (N-2) samples. Why it reduces 2 samples.

[Greg Heath]

Input samples as target makes no sense.

Which net are you using?

Sample code?

Answer 1

[Greg Heath]

If you are using a time series net with 2 input and/or feedback delays, then this is to be expected.

Otherwise, there is probably something wrong.

Post your code.

Hope this helps.

Thank you for formally accepting my answer

Greg