How do I specify the ranges of atan2?

Hello,

I would like to, based on a vector with points (0,0) and (x,y) where (x,y) is anywhere in the plane, to calculate the angle between that vector and the positive vertical Y-axis.

So, I would like that when the vector matches the positive Y, I get 0 degrees.

AND I would like that it increases when going counterclockwise. AND I would like that I have a range between 0 and 360 degrees, no minus or other values.

How to do this with atan2? I am having problems with it even though it's simple trigonometry. I'm trying to avoid using IF statements and such.

Any help would be appreciated.

Kind Regards,

Francesco

Answer 1

[Iman Ansari]

I replaced x and y in atan2d:

[x,y]=meshgrid(1:-0.1:-1);
m = atan2d(x,-y)+180;
mesh(x,y,m)