How do I generate a confusion matrix for multi-class example?

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I have 8 classes to be allocated to a 10 X 800 sized dataset. I have done the classification successfully - using Support Vector Machines. But I am puzzled as to how I can show the results of it? How do I generate a confusion matrix for 8 classes? What is the best way to view the hyperplane generated by the multiclass SVM?
Please guide me through this. Provide me some examples.
Help is very much appreciated. Thanks!

Answers (2)

Eric Nunes
Eric Nunes on 25 Apr 2014
You just need to have 2 parameters, the predicted labels and the actual labels. After that just use C = confusionmat(predicted , Actual). It will construct the confusion matrix.

Abbas Manthiri S
Abbas Manthiri S on 7 Feb 2017
  1 Comment
Selena Johnson
Selena Johnson on 30 Aug 2018
Hi does this code work for categorical data as well? I just tried to run it and it is giving me error messages about line 45.

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