healpy.pixelfunc.nside2order¶
- healpy.pixelfunc.nside2order(nside)¶
Give the resolution order for a given nside.
- Parameters:
- nsideint
healpix nside parameter; an exception is raised if nside is not valid (nside must be a power of 2, less than 2**30)
- Returns:
- orderint
corresponding order where nside = 2**(order)
Notes
Raise a ValueError exception if nside is not valid.
Examples
>>> import healpy as hp >>> import numpy as np >>> hp.nside2order(128) 7
>>> np.all([hp.nside2order(2**o) == o for o in range(30)]) True
>>> hp.nside2order(7) Traceback (most recent call last): ... ValueError: 7 is not a valid nside parameter (must be a power of 2, less than 2**30)