Python conversion between coordinates

Question

Are there functions for conversion between different coordinate systems?

For example, Matlab has [rho,phi] = cart2pol(x,y) for conversion from cartesian to polar coordinates. Seems like it should be in numpy or scipy.

Answer 1

Using numpy, you can define the following:

import numpy as np  def cart2pol(x, y):     rho = np.sqrt(x**2 + y**2)     phi = np.arctan2(y, x)     return(rho, phi)  def pol2cart(rho, phi):     x = rho * np.cos(phi)     y = rho * np.sin(phi)     return(x, y)