galpy.util.coords.rect_to_cyl

galpy.util.coords.rect_to_cyl(X, Y, Z)

Convert from rectangular to cylindrical coordinates

Parameters:

• X (float or numpy.ndarray) – X coordinate.

• Y (float or numpy.ndarray) – Y coordinate.

• Z (float or numpy.ndarray) – Z coordinate.

Returns:

Containing (R,phi,z)

Return type:

numpy.ndarray

Notes

• 2010-09-24 - Written - Bovy (NYU)

• 2019-06-21 - Changed such that phi in [-pi,pi] - Bovy (UofT)