output didn't came out in if statement matlab

I would like to get an output for angle2 in my worksheet however angle2 remain as zeros. what's goes wrong? output didn't came out in if statement below.

angle = atan2(r - cy, c - cx); %Calculate the angle from centroid cx,cy
angle1 = angle * 360 / (2*pi); %Convert my angle in degree
angle2 = zeros(size(angle1)); %Set angle2 as zeros value with size 320X1 
    if (angle1 < 0) 
    angle2 = angle1 + 360; %Adding any negative angle values to 360 so i get the values from 1-360 degree
    end