MATLAB: How to relabel classes into one sub group

Question

Suppose I have 3 different classes below, how to I relabel 'versicolor' and 'virginica' into another class named 'abnormal' temporary because I want to do classification for 'setosa' and 'abnormal' using fitcsvm function first and later I will need to relabel the class again for another fitcsvm classifcation model.

Answer 1

load fisheriris
idx = ~ismember(species, 'setosa');
species(idx) = {'abnormal'};