Problem 58882. Neural Nets: Activation functions

Created by Richard Zapor

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Return values of selected Activation function type for value,vector, and matrices.
y=Activation(x,id); where id is 1:4 for ReLU, sigmoid, hyperbolic_tan, Softmax
ReLU: Rectified Linear Unit, clips negatives  max(0,x)   Trains faster than sigmoid
Sigmoid: Exponential normalization [0:1]      
HyperTan: Normalization[-1:1]   tanh(x)
Softmax: Normalizes output sum to 1, individual values [0:1]      Used on Output node
Working though a series of Neural Net challenges from Perceptron, Hidden Layers, Back Propogation, ..., to the Convolutional Neural Net/Training for Handwritten Digits from Mnist. 
Might take a day or two  to completely cover Neural Nets in a Matlab centric fashion. 
Essentially Out=Softmax(ReLU(X*W)*WP)

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Last Solution submitted on Aug 14, 2025

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Richard Zapor on 21 Aug 2023

Multi-Case Softmax should be y=exp(x)./sum(exp(x),2)

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Problem 58882. Neural Nets: Activation functions

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Problem 58882. Neural Nets: Activation functions

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