MATLAB: Create a matrix on the basis of other matrix

MATLAB

Hi given a matrix 
M= [ 0	4	8	6;
     0	0	0	6;
     0	0	0	6;
     2	0	0	0;
     0	0	0	0;
     0	0	0	1;
     0	4	7	0;
     5	3	0	0;
     0	0	0	6;
     0	0	0	6;];
I want to create a new matrix A that contain just the diversity, no matter of the order and with no zeros.
so in this case
A = [2 4 8 6;
     5 3 7 1];
Someone can help me with the code?

Best Answer

Under the assumption that the "diversity" contains the same number of entries each row
for i = 1:size(M,2)
    b(:,i) = unique(nonzeros(M(:,i)));
end
If each column can have different number of interest
b = arrayfun(@(i)unique(nonzeros(M(:,i))),1:size(M,2),'UniformOutput',false)
then you can access to the unique values of the jth row as
b{j}
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