is this NN using Backpropagation ??

net = newff(minmax(alphabet),[S1 10 S2],{'logsig' 'logsig' 'logsig' },'traingdx');

net.LW{2,1} = net.LW{2,1}*0.01;

net.b{2} = net.b{2}*0.01;

net.performFcn = 'mse';

net.trainParam.show = 20;

net.trainParam.epochs = 2000;

net.trainParam.mc = 0.95;

P = alphabet;

T = targets;

[net,tr] = train(net,P,T);

Answer 1

[Greg Heath]

1. NEWFF is an OBSOLETE function. Check the HELP and DOC documentation

   help newff
   doc  newff

For example:

 >> help newff
 %    newff Create a feed-forward backpropagation network.
 % 
 %   Obsoleted in R2010b NNET 7.0.  Last used in R2010a NNET 6.0.4.
 %  The recommended function is feedforwardnet.

NOTE: The current function to use is FITNET, the special case of FEEDFORWARDNET used for regression and curvefitting.

2. From the commands HELP NEWFF & DOC NEWFF you can find

    newff( ... BTF, BLF, ... ) takes optional inputs,
      ...
       BTF - Backprop network training function, default = 'trainlm'.
       BLF - Backprop weight/bias learning function, default = 'learngdm'.

3. Similarly, to help understand ANY MATLAB term, use the HELP and DOC commands.

Hope this helps.

Thank you for formally accepting my answer

Greg