MATLAB: How remove frequent values

frequent values

hi,

is there a command can remove frequent values from vector?

thanks

x = floor(rand(1, 100)*10);
[N, Bin] = histc(x, unqiue(x));

Now you can use sort(N) to find the most frequent elements. Then you can search the corrsponding indices in Bin.

Assuming that elements of A are integers greater or equal to 1, you could do something like:

 >> nonUniqueValues = find( accumarray(A.', ones(size(A))) > 1 )
 nonUniqueValues =
     1
     3
     4

EDIT: we could also imagine an approach based on diff(sort(A))==0, but I prefer the approach above.

Perhaps you want the unique() function:

A=[2012  1  1  0
2012  1  1  0
2012  1  1  0
2012  1  1  0
2012  1  1  1
2012  1  1  1];
[C,ia,ic] = unique(A,'rows')

Well, at least it gives you what you asked for, for the matrix you gave. C is exactly what you said the output should be.