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Matrix reduction to see how many various elements the matrix has

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Homayoon
Homayoon 2016-2-1
编辑： Stephen23 2016-2-1
Dear All,
I have a 1*12 row whose elements are integers. Some of the elements might be repeated. I need to reduce the matrix to a smaller one which just contains the non-zero numbers disregarding of how many time they have been repeated.
for an Example
A = [4, 0, 0, 1, 4, 4, 2, 0, 1, 3, 9, 0]
The desired output is something like
Reduced = [ 4, 1, 2, 3, 9]
Please note that 0 should be excluded. Thank you so much for the help.

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Stephen23
Stephen23 2016-2-1
编辑：Stephen23 2016-2-1
You could use unique with the 'stable' option:
>> A = [4, 0, 0, 1, 4, 4, 2, 0, 1, 3, 9, 0];
>> unique(A(A~=0),'stable')
ans =
4 1 2 3 9

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