How can I add constraint on Neural network

I use matlab to model ANN using some data. and some minmun target has zero value

ANN model and it's graph is continuous, so it has - region but it is impossble for output data to get - value

so i want to exclude thoes - region

How can i give my ANN such constraints?

[gyuyoung Hwang]

actually, there is no change at activation function tanhx(-1<y<1);

but while i model neural network, can i put some constraint in neural network to get postive values of output?

Answer 1

[Srivardhan Gadila]

The following links might help you:

1. mathworks.com/matlabcentral/answers/99132-is-it-possible-to-impose-constraints-on-a-neural-network-using-neural-network-toolbox
2. mathworks.com/matlabcentral/answers/197825-neural-nets-with-constraints
3. mathworks.com/matlabcentral/answers/305546-neural-networks-can-i-constrain-the-range-of-the-output-of-the-network