English: Proportional accurate arctangent2-graph plotted with cubic bezier-curves. The atan2(y,x)-function is especially implemented in programming languages. It yelds the angle from the x-axis to any point (x,y). The case x=0 is not depicted. That complies with the asymptotes at y=±π/2. Labels are created with embedded "Computer Modern" font.
Arctangent2.svg -
a nice plot of the arctangent2 function
画像の説明
Arctangent2(arctan2)-function
atan2(y,x) takes two arguments x and y.
It calculates the angle frome the x-axis to the point (x,y).
atan2 is usually implemented in programming languages like C++.
from Wikimedia Commons
plot-range: -4.5 to 4.5
plotted with cubic bezier-curves in several intervalls
the bezier-controll-points are calculated to give a very accurate result.
symbols in "Computer Modern" (TeX) font embedded
created with a plain text editor using GNU/Linux