How to plot only few classes for confusion matrix?

Hello, i have a neural network with 102 classes and i want to plot the confusion matrix for few classes (for example 10). i used the command below to plot the normal confusion matrix but having 102 classes make the confusion matrix unreadable. How can i plot only a number of classes instead of all? Thanks

plotconfusion(YTrain,YPredicted)

Answer 1

[Greg Heath]

Oviously, you have to subsample the original matrices.

Greg