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

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!

Answer 1

[Eric Nunes]

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.

Answer 2

[Abbas Manthiri S]

please refer this code

https://in.mathworks.com/matlabcentral/fileexchange/60900-multiclass-confusion-matrix-with-basic-measurement-and-also-f-score-mcc-and-cohen-s-kappa

[Selena Johnson]

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.