In Table 9.4 of the documentation atan2 is described as follows:
atan2(x, y) | inverse tangent of x/y |
I am sure it should read as:
atan2(y, x) | inverse tangent of y/x |
This looks to be the standard C++/c atan2(y,x) function.
You can easily test this:
If y = 2, x = 1, then degrees(atan(y/x)) =63.4 but if we proceed according to the documentation; degrees(atan2(x,y))=degrees(atan2(1,2))=25.6 which is not the same as degrees(atan(y/x)).
So it must be degrees(atan2(y,x))=degrees(atan2(2,1))=63.4.
Thanks
Andrew
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Andrew J. P. Maclean
Centre for Autonomous Systems
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