identifying successive dates in a cell vector

Dear all

I have the following sequence of dates

A={

 '11/08'
    '11/08'
    '12/08'
    '01/09'
    '02/09'
    '03/09'
    '04/09'
    '05/09'
    '06/09'
    '07/09'
    '08/09'
    '09/09'
    '10/09'
    '11/09'
    '11/09'
    '12/09'
    '01/10'
    '02/10'
    }

As you can see some succesive dates contain the same month/year (for example the first 2 dates).

I would like to be able to identify the identical succesive dates

so as to construct an if statetement that will say

 for ii=2:length(A)
if A(ii,1)==A(ii-1,1)
    'do this'

 end
end

Answer 1

[Andrei Bobrov]

[a,b,c] = unique(A);
[jj,jj] = sort(b);
out = accumarray(c,(1:numel(c))',[],@(x){x});
out = [a(jj),out(jj)];

ADD

a = [false all(diff(char(A)-'0')==0,2)'];
a(strfind(a,[0 1])) = true;

or

[c,c,c] = unique(A);
k = [false;diff(c)==0];
k(find(k)-1)=true;

[Sabbas]

thanks andrei. But I need to leave the initial vector of dates unchanged so as to have for example

AA=(1, 1,0, 0,..)

[Sabbas]

could you please help me?. I am so close in finding the correct answer

thanks

[Andrei Bobrov]

see ADD

[Sabbas]

Excellent!