source: proiecte/pmake3d/make3d_original/Make3dSingleImageStanford_version0.1/third_party/lightspeed/subv2ind.m @ 37

Last change on this file since 37 was 37, checked in by (none), 14 years ago

Added original make3d
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1function index = subv2ind(siz,sub)
2%SUBV2IND   Linear index from subscript vector.
3% SUBV2IND(SIZ,SUB) returns an equivalent single index corresponding to a
4% subscript vector for an array of size SIZ.
5% If SUB is a matrix, with subscript vectors as rows, then the result is a
6% column vector.
7%
8% This is the opposite of IND2SUBV, so that
9%   SUBV2IND(SIZ,IND2SUBV(SIZ,IND)) == IND.
10%
11% See also IND2SUBV, SUB2IND.
12
13% Written by Tom Minka
14
15prev_cum_size = [1 cumprod(siz(1:end-1))];
16%index = (sub-1)*prev_cum_size' + 1;
17index = sub*prev_cum_size' - sum(prev_cum_size) + 1;
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