how to get confusion matrix when neural network toolbox is used?

i have used NN toolbox for classification. after network is trained, "performance plot", "regression plot" and "training state plot" options are displayed. there is no option for displaying confusion matrix. how can i get it?

Answer 1

[Greg Heath]

Feedforwardnet is a generic net that NEVER has to be called directly.

Use fitnet for regression/curvefitting and use patternnet for classification/pattern-recognition. Both call feedforwardnet internally with the appropriate options.

Using patternnet, the plot options are

 Performance
 Training State
 Error Histogram
 Confusion
 Receiving Operating Characteristic

Hope this helps.

Thank you for formally accepting my answer

Greg

Answer 2

[B.k Sumedha]

As soon as you train the network you get the option to plot the confusion matrix.Take a look at this pdf.

http://www.mathworks.in/products/datasheets/pdf/neural-network-toolbox.pdf

[pranjal]

thanks for reply. but sir @B.k Sumedha i have used command "nntool" since command nprtool not accepting my target data. so with above command i dont confusion matrix option.pls help

[B.k Sumedha]

I think you need to use certain commands like given in below document. Upto my knowledge you cant directly plot the matrix just my using nntool. http://in.mathworks.com/help/nnet/ref/plotconfusion.html

[Greg Heath]

Of course you can

 [x,t] = simpleclass_dataset;
 net   = patternnet;
 net   = train(net,x,t);
 y     = net(x);

The nntool automatically pops up with the following option buttons

 Performance
 Training State
 Error Histogram
 Confusion
 Receiver Operating Characteristic

Just click on the button

Hope this helps.

Thank you for formally accepting my ABOVE answer

Greg

[B.k Sumedha]

Yes and its obvious that it must pop-up. But just using the

'nntoool' command window you cant get those buttons which you have specified.