Backpropagation ANN Code - for beginner

Question

Jacky 2012-11-9

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https://ww2.mathworks.cn/matlabcentral/answers/53331-backpropagation-ann-code-for-beginner

Hi,

I would like to use Matlab ANN Toolbox to train a backpropagation network. I have my algorithm works in C#; but I would still like to do a simulation in Matlab to find the best number of neurons for the hidden layer. I am using a 3-layers network; with 200 inputs, 10 hidden neurons and two output neurons.

However, I have very limited experience with ANN Toolbox; so could someone help me getting start?

I tried the nnstart but it only has 1 output in the network; so that didn't help me much.

I have my test data stored in text file. Which I can readily load into ANN.

Thanks

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Answer 1

Greg Heath 2012-11-10

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Three examples of my sample code obtained from Answers using the two search words: heath ntrial

A1. 25 Oct 2012 Neural Network Output Problem Asked by Younes Jafari

A2. 21 Aug 2012 How can I forecast an integer related to other 5 numbers?Asked by Mehdi Abbassi

A3 1 Apr 2012 Neural Network help Asked by Amjad

============================================================================= Six examples of my sample code obtained from the Newsgroup using the two search words: heath ntrial

N1. 27 Oct 2012 Neural Network training problem Greg Heath 4 725

N2. 8 Apr 2012 FULL ADDER using neural network Greg Heath full adder, neural networks 6 951

N3. 5 Mar 2012 simple neural network question Greg Heath neural network, nn 1 531

N4. 1 Feb 2012 Validation set and Parameters in Backpropagation ANN N validation set, resilient backp...resilient backpropagation, classification 10 1161

N5. 4 Jan 2012 Elliptical Basis Function NN Design Greg Heath elliptic 0 455

N6. 3 Jan 2012 error in neural network Greg Heath index exceeds m...index exceeds matrix dimensions 5 1164

Hope this helps.

Thank you for formally accepting my answer.

Greg

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Answer 2

Jacky 2012-11-12

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https://ww2.mathworks.cn/matlabcentral/answers/53331-backpropagation-ann-code-for-beginner#answer_65120

Thanks Greg,

I took a look at those links, and some others in Mathworks answer community, but I didn't get much of what the Matlab code were doing as I am very naive in programming with Matlab. Do you know of where I can start learning the syntax of using ANN for matlab? And possibly, do you know of any simpler example program for backpropagation written in Matlab so that a beginner could understand?

Basically all I want is a ANN using backpropagation with n number of input, 1 hidden layer with m number of neurons and x number of output.

For testing, I would only use 200-m-2 number of neurons.

thanks