MATLAB: Script for neural nertwork

biasneural networksweights

Hi, I am really new in matlab. 1.Can anyone provide me with a script to run ANN to predict using input and targets. 2. Also if the script can calculate bias and weights. 3. Using a transig 4.hidden layer with 6 neurons 5. Outputs giving mse and r values Also giving Ever other output that a neural network toolbox gives. Input 34*6 matrix Target 34*1 matrix It would be of great help. Thank you

Best Answer

The "N"umber of individual "I"-dimensional "I"nputs and corresponding "O"-dimensional "O"utput "t"argets are given by
 x = input; size(x)  = [ I N ]
 t = target; size(t) = [ O N]
I have hundreds of posts in both the MATLAB NEWSGROUP (comp.soft-sys.matlab) and ANSWERS which estimate the maximum number of "H"idden nodes, H <= Hmax to avoid overtraining an overfit net by simply not overfitting.
Since only one hidden layer is sufficient, a straightforward search over random initial weights easily determines the minimum number of hidden nodes for a given performance. I use
 mean-square-error(training set output) <= 0.01*mean( training set target variance)
(with the obvious assumption that the validation and test subsets have statistics similar to that of the training subset). In other words, I try to do 100 times better than assuming the output is a constant equal to the mean of the target.
Adding the search word "greg" tends to yield my most appropriate posts in most neural network topics.
Hope this helps
Thank you for formally accepting my answer
 Greg
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