MATLAB: How to find unique values in column

columnunique

This is my matrix
m=
     1    10
     2     1
     2     2
     2     3
     2     4
     3     1
     3     2
     3     3
     5     1
     5     2
     5     4
     6     2
I want to unique first column and second one can be anything among own values. I want to something like that
     1    10
     2     1
     3     2
     5     4
     6     2
P.S I tried "unique" code it didnt work

Best Answer

[~,b]=unique(m(:,1),'stable')
out=m(b,:)
If you want to choose the second column randomly
[~,~,c]=unique(m(:,1),'stable')
ii=accumarray(c,(1:numel(c))',[],@(x) x(randi(numel(x))))
out=m(ii,:)
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