On Tue, Jun 26, 2018 at 8:26 PM, Sharan Basappa <sharan.basa...@gmail.com> wrote:
> Folks, > > I know this is not a machine learning forum but I wanted to see if anyone > can explain this to me. > > In artificial neural network, I can understand why sigmoid is used but I > see that derivative of sigmoid output function is used. I am not able to > understand why. > > For example: > # convert output of sigmoid function to its derivative > def sigmoid_output_to_derivative(output): > return output*(1-output) > The derivative tells you what direction to go in, as you update your coefficients. It's a slope of a curve. Otherwise, you'd be steering blind. -- https://mail.python.org/mailman/listinfo/python-list
