How to costum the neural network in matlab?

Ms. Kh,

If you are using the Neural Networks toolbox of Matlab, you may address the layer and define its activation function, e.g. layer{x}.transferFcn

For example: https://www.mathworks.com/matlabcentral/answers/222537-in-neural-network-how-can-i-change-the-sigmoid-activation-function-to-a-gaussian-one-how-to-modif

Alvaro Rodriguez

There is a set of functions you can use for Matlab neural networks, such as 'tansig ' or ' logsig'

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tansig is a neural transfer function. Transfer functions calculate a layer’s output from its net input.

A = tansig(N,FP)

takes N and optional function parameters:

And returns A, the S-by-Q matrix of N’s elements squashed into [-1 1].

Code to créate the function

n = -5:0.1:5; a = tansig(n); plot(n,a)

Assign this transfer function to layer i of a network.

net.layers{i}.transferFcn = 'tansig';

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Also should be posible to use a custom function as far as i know. You should be able to define a function and pass it as a parameter when defining the network.

See this code i found on the web

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% I use my transfer function "myfunction" for first ant second layer.

% I use transfer function "purelin" for output layer

net = newff(p,t,[nsk1,nsk2],{'myfunction','myfunction','purelin'});

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