MATLAB: Programming in Matlab. i need net1, net2 and net3 constructed. but i have only net replaced 3 times. the variable net might be unused is the warning. please help

programming in matlab

for sheetno=1:3
      dn1='net'  ;
  dn2=num2str(sheetno);
    net=[dn1 dn2];
net=fitnet(10);
end

Best Answer

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

In your situation I would save the values inside a structure using dynamic field names. Then save() the structure using the -struct option.

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MATLAB: MAPE for out-of-sample in neural network

Not sure why you would use a measure that has the possibility of being infinite. However

mape = mean(abs(e./t))

Hope this helps

Thank you for formally accepting my answer

Greg

MATLAB: Net reusing

Inside your loop, the input to train() is definitely the value of "net" that just calculated in the previous. I am guessing you want to do something like this instead:

net0 = patternnet(10);
% net0 initialization
% ...
for ii=1:10
   net = train(net0,in,tar);
   netSet{ii} = net;
end

This way, you are starting from the initialized value "net0" each time. I don't know enough about neural nets to know if train() has some randomness in it that will make each value of netSet(ii) different.

Also, note that you do not really need the intermediate value "net" inside your loop. You could just do

for ii=1:10
   netSet{ii} = train(net0,in,tar);
end

Best Answer

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MATLAB: MAPE for out-of-sample in neural network

MATLAB: Net reusing

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