sep.ellipse_axes¶
-
sep.
ellipse_axes
(cxx, cyy, cxy)¶ Convert from coefficient ellipse representation to ellipse axes and angle.
Parameters: cxx, cyy, cxy : array_like
Describes the ellipse(s)
cxx * x**2 + cyy * y**2 + cxy * x * y = 1
Returns: a, b, theta :
ndarray
Ellipse(s) semi-major, semi-minor axes and position angle respectively. Position angle is radians counter clockwise from positive x axis to major axis, and lies in range
(-pi/2, pi/2)
Raises: ValueError
If input parameters do not describe an ellipse.