How do I relabel classes into one sub group?

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

[Adam Danz]

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

[tinkiewinkie]

Thanks it work well, and is there any command that I can use in the later part of the algorithm to revert back to the orginal class? For example from 'abormal' back to 'versicolor' and 'virginica' and relabel 'virginica' and 'setosa' as 'abnormal2'?

[Adam Danz]

I would just make a copy of the species array so you don't lose that data. You can change the ismember() inputs as needed. For example,

idx = ~ismember(species, {'virginica','setosa'});