MATLAB: How to add a number to the negative values in a vector

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Dear All,
I have a vector [A] which includes positive and negative values A = [1 4 5 2 -3 4 5 7 -6 -6]. I want to change those negative values by adding -180 to them, so my new vector will be like this
A = [1 4 5 2 -183 4 5 7 -186 -186].
Any idea how find that?
So far I tried this but not working
for i = 1:10
    for j = 1:1
        if A(i,j)<=0
            A(i,j) = A + -180;
        end
    end
end

Best Answer

A = [1 4 5 2 -3 4 5 7 -6 -6];
t = A < 0;
A(t) = A(t) - 180;
ADD
May be use the following:
A = mod(A,180);
I think that '180' it 'pi' in this case.
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