healpy.pixelfunc.ring2nest¶
- healpy.pixelfunc.ring2nest(nside, ipix)¶
Convert pixel number from RING ordering to NESTED ordering.
Parameters: nside : int, scalar or array-like
the healpix nside parameter
ipix : int, scalar or array-like
the pixel number in RING scheme
Returns: ipix : int, scalar or array-like
the pixel number in NESTED scheme
Examples
>>> import healpy as hp >>> hp.ring2nest(16, 1504) 1130
>>> hp.ring2nest(2, np.arange(10)) array([ 3, 7, 11, 15, 2, 1, 6, 5, 10, 9])
>>> hp.ring2nest([1, 2, 4, 8], 11) array([ 11, 13, 61, 253])