How to generate confusion matrix for multi class?

I have 4 classes and want to plot confusion matrix.I referred to examples but i can't understood. Anyone please help how to plot confusion matrix if i have 5 classes. and what are requirements for plotting confusion matrix.

Answer 1

[Abhipsa]

Hi @tejasvee,

For plotting the confusion matrix for 5 classes, you can use “confusionchart” from MATLAB Deep Learning Toolbox (https://www.mathworks.com/help/releases/R2024b/deeplearning/ref/confusionchart.html ) starting from MATLAB R2018b.

The attached file named “confusion_chart.m” demonstrates creating a confusion matrix using “confusionchart”.

Output of the attachment “confusion_chart.m”:

Since “confusionchart” is available from MATLAB R2018b, for older versions, “confusionmat” can be used instead.

The attached file named “confusion_mat.m” demonstrates creating a confusion matrix using “confusionmat”.

Output of the attachment “confusion_mat.m”:

You can use the command “>> doc confusionmat” to know more about it.

I hope this helps you!