How can I change the label for my elements with same name?

How can I count the the strings with the sabe value and then add them in another ID with the increasing number for the elements with the same label

For example I have the next vector

A = {'1_01';'1_01';'1_01';'1_02';'1_02'}

and the result should be this

B = {'1_01-1';'1_01-2';'1_01-3';'1_02-1';'1_02-2'}

str1 = '-';

Answer 1

[Chunru]

A = {'1_01';'1_01';'1_01';'1_02';'1_02'};
uA = unique(A);
B = A;
for i=1:length(uA)
    idx = find(strcmp(A, uA(i)));
    for j=1:length(idx)
        B{idx(j)} = sprintf('%s-%d', B{idx(j)}, j);
    end
end
%B = {'1_01-1';'1_01-2';'1_01-3';'1_02-1';'1_02-2'}
B

B = 5×1 cell array
    {'1_01-1'}
    {'1_01-2'}
    {'1_01-3'}
    {'1_02-1'}
    {'1_02-2'}

[DulceEien]

thank you, it is working :))