healpy.pixelfunc.vec2ang¶

healpy.pixelfunc.vec2ang(vectors, lonlat=False)¶

vec2ang: vectors [x, y, z] -> theta[rad], phi[rad]

Parameters:

vectors : float, array-like

the vector(s) to convert, shape is (3,) or (N, 3)

lonlat : bool, optional

If True, return angles will be longitude and latitude in degree, otherwise, angles will be longitude and co-latitude in radians (default)

Returns:

theta, phi : float, tuple of two arrays

the colatitude and longitude in radians