healpy.pixelfunc.xyf2pix

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healpy.pixelfunc.xyf2pix#

healpy.pixelfunc.xyf2pix(nside, x, y, face, nest=False)#

xyf2pix : nside,x,y,face,nest=False -> ipix (default:RING)

Parameters:
nsideint, scalar or array-like

The HEALPix nside parameter, must be a power of 2

x, yint, scalars or array-like

Pixel indices within face

faceint, scalars or array-like

Face number

nestbool, optional

if True, assume NESTED pixel ordering, otherwise, RING pixel ordering

Returns:
pixint or array of int

The HEALPix pixel numbers. Scalar if all input are scalar, array otherwise. Usual numpy broadcasting rules apply.

See also

pix2xyf

Examples

>>> import healpy as hp
>>> hp.xyf2pix(16, 8, 8, 4)
1440

>>> print(hp.xyf2pix(16, [8, 8, 8, 15, 0], [8, 8, 7, 15, 0], [4, 0, 5, 0, 8]))
[1440  427 1520    0 3068]
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