healpy.pixelfunc.vec2pix¶

healpy.pixelfunc.vec2pix(nside, x, y, z, nest=False)¶

vec2pix : nside,x,y,z,nest=False -> ipix (default:RING)

Parameters:

nsideint or array-like: The healpix nside parameter, must be a power of 2, less than 2**30
x,y,zfloats or array-like: vector coordinates defining point on the sphere
nestbool, optional: if True, assume NESTED pixel ordering, otherwise, RING pixel ordering

Returns:

ipixint, scalar or array-like: The healpix pixel number corresponding to input vector. Scalar if all input are scalar, array otherwise. Usual numpy broadcasting rules apply.

See also

Examples

>>> import healpy as hp
>>> hp.vec2pix(16, 1, 0, 0)
1504

>>> print(hp.vec2pix(16, [1, 0], [0, 1], [0, 0]))
[1504 1520]

>>> print(hp.vec2pix([1, 2, 4, 8], 1, 0, 0))
[  4  20  88 368]

healpy