PNN probability

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hi,

I am using the newpnn to simulate a PNN in matlab. Since at the pattern layer of the network the class of a test is given by the one with maximum probability, how can i output this probability in matlab ?

I have tried the sim function. It has an output "perf", but we it is applied to the net created by newpnn, matlab gives me the error message as follows:

[Y,Pf,Af,E,perf] = sim(net,P) ??? Error using ==> feval Invalid function name ''

Error in ==> network.sim at 213 perf = feval(net.performFcn,E,Y,net,net.performParam);

who can help to solve this problem ? Thanks a lot