sep.ellipse_axes¶
- sep.ellipse_axes(cxx, cyy, cxy)¶
Convert from coefficient ellipse representation to ellipse axes and angle.
- Parameters
- cxx, cyy, cxyarray_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)
- a, b, theta
- Raises
- ValueError
If input parameters do not describe an ellipse.