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vec2pix_help.m@ 25367

Last change on this file since 25367 was 25367, checked in by adhikari, 5 years ago
NEW: matlab package for analyzing spherical harmonics based on Max Tegmark's HEALpix tool
Property svn:executable set to ``*
File size: 874 bytes

Rev	Line
[25367]	1	%% vec2pix
	2	% Convert cartesian direction vectors to MEALPix pixel numbers
	3
	4	%% Syntax
	5	% nPix = vec2pix(nSide,xyz,'Param1',Value1,...);
	6
	7	%% Input Arguments
	8	% nSide HEALPix resolution parameter
	9	% xyz cell array of [3,1] cartesian direction vectors
	10	%
	11	% Param Value
	12	% 'nest' use nested indexing (true \| {false})
	13
	14	%% Return Arguments
	15	% nPix size(xyz) pixel number array
	16
	17	%% Example
	18	% Find pixels corresponding to a [4,5] set of (unnormalized) cartesian
	19	% vectors:
	20	nSide = 4;
	21	xyz0 = squeeze(num2cell(2*rand(3,4,5)-1,1));
	22	nPix = vec2pix(nSide,xyz0)
	23
	24	% Find the normalized vectors corresponding to the pixels
	25	xyz1 = pix2vec(nSide,nPix);
	26
	27	% Find angular distance from vectors to pixels
	28	d = angDist(xyz0,xyz1)
	29
	30	%% See also
	31	% ang2pix, pix2ang, pix2vec
	32
	33	%% Requires
	34	% ring2nest
	35
	36	%%
	37	% Copyright 2010-2011 Lee Samuel Finn. <mealpix_notices.html Terms of Use>.

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