need help with neural network

i'm working on a M file (script) to run neural network training for several time (10 times each) and i want to save the neural network results concerning MSE and Regression R coefficient for the Training and Validation and test data i want to know how to write a code to save the neural results??

[amro mahran]

I want to know the code of the function that calculate the MSE and Rcoefficient

Answer 1

[Léon]

The solution to your problem should be a simple loop. Meaning that you put your relevant ANN code in that loop and save the output each time. Like the following

 MSE_all = zeros(10,1); % preallocate space to the vector for all MSE values
 R_all = zeros(10,1); % see above

for i = 10

     % here goes your ANN training code

     MSE_all(i) = MSE; % MSE means here the needed output by the ANN that should 
     % be stored
     R_all(i) = R; % see above

end

[amro mahran]

Thanks for your help

but please i want to know the MSE function and the R function that is used

Answer 2

[Greg Heath]

Many examples of code that computes and saves Ntrials values of MSE and R^2 (coefficient of determination) can be obtained by searching the Newsgroup with the search words

heath Ntrials

Hope this helps

Greg

[amro mahran]

I tried to understand Newsgroup results but i' m a beginner

i'm using the Plotreg() function to determine the Regression R coefficient as follow

Y=sim(net,inputs0);

[~,~,r]=postreg(Y(tr.testInd),targets(tr.testInd))

is it right or not????

and for the MSE i use:

E=targets-Y;

mse_test=mse(E(tr.testInd));

Is it wright ???

Answer 3

[Greg Heath]

If you have source access try this:

type mse

type postreg

Hope this helps.

Greg