Matrix reduction to see how many various elements the matrix has

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.

Answer 1

[Stephen23]

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