MATLAB: Array in array in image?

arraycode matlabmatrix array

I want array value not 0 keep to new array ?
r = img(:,:,1); g = img(:,:,2); b = img(:,:,3);
% double aa; double aa;
AR = [r];
[i,j] = size(AR);
for i = 1:j
    if (AR(i) ~= 0)
        aa = [AR(i)]
    end
end

Best Answer

To get the non-zero elements of an array simply do something like:
 A = randn(100, 100); 
 A_non_zero = A( A~=0 );
This stores the non-zero elements of matrix A in the array A_non_zero.
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