MATLAB: The demos of neural network toolbox on back propagation(BP).

back propagationbpdemosneural network toolbox

Hi, I　want to find the demos or examples about BP(back propagation)neural network in the neural network toolbox of Matlab. Who can help me or give me a recommendation to find all of them?

Thank you very much.

Best Answer

 a. help fitnet  % regression and curve-fitting
 b. help patternnet % classification and pattern recognition

2. Replace help with doc

3. Search using

 a. greg fitnet Ntrials
 b. greg patternnet Ntrials

Thank you for formally accepting my answer*

Greg

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MATLAB: How to train a feedfordward neural network with error weights

 Use the command window
 help mse
 doc mse

Hope this helps.

Thank you for formally accepting my answer

Greg

MATLAB: BP Neural Network

If the net

1. MUST be a 2-hidden-layer FFMLP

2. MUST use the 1st hidden layer to recognizably separate the 4 classes

3. MUST be trained via BackProp

Try versions of the following:

1. For each class, design a 136-1-1 two-class classifier using patternnet(1). Since the initial weights are random, design many ( 10 each?) and choose the best.

2. Use the weights of the 4 selected classifiers for the first layer weights of a 136-4-4 four-class classifier using patternnet([4 H]).

3. Choose a good value for H by trial and error.

4. If you cannot freeze the 1st layer weights with learning rates of zero, store the hidden layer outputs of the two-class classifiers to train the last two layers of the four-class classifier.

Hope this helps.

Greg

Best Answer

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