Finding unique dates in vector

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Mads
Mads 2011-5-25
Hi all.
I have a vector of dates where each date is repeated many times. How would i create a vector with every date but no repetitions efficiently?
Thx.
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Jan
Jan 2011-5-25
What exactly means "vector of dates"? Please post the type of the input exactly. I assume that UNIQUE will help you directly.

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Andrei Bobrov
Andrei Bobrov 2011-5-25
Date = ['02-Aug-2010 19:28:01'
'13-Nov-2010 09:10:20'
'10-Nov-2010 14:44:14'
'02-Aug-2010 19:28:01'
'08-Oct-2010 08:58:46'
'30-Jan-2010 08:24:16'
'10-Nov-2010 14:44:14'
'13-Nov-2010 09:10:20'
'08-Oct-2010 08:58:46']
[a n] = unique(datenum(Date));
D1 = sortrows([a n],2);
Dout = datestr(D1(:,1));
Hi Jan! agree with you. In our case, it is possible and so:
[a n] = unique(Date,'rows')
[~,idx] = sort(n);
Dout = a(idx,:);
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Matt Tearle
Matt Tearle 2011-5-25
...assuming that the dates are all in the exact same format. Andrei's solution (going via datenum) avoids the problem of two different formats for the same date. (Unlikely, but it could happen.)

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