healpy.pixelfunc.nest2ring

healpy.pixelfunc.nest2ring(nside, ipix)

Convert pixel number from NESTED ordering to RING ordering.

Parameters:

nside : int, scalar or array-like

the healpix nside parameter

ipix : int, scalar or array-like

the pixel number in NESTED scheme

Returns:

ipix : int, scalar or array-like

the pixel number in RING scheme

See also

ring2nest, reorder

Examples

>>> import healpy as hp
>>> hp.nest2ring(16, 1130)
1504

>>> hp.nest2ring(2, np.arange(10))
array([13,  5,  4,  0, 15,  7,  6,  1, 17,  9])

>>> hp.nest2ring([1, 2, 4, 8], 11)
array([ 11,   2,  12, 211])