Mercurial > hg > camir-aes2014

annotate toolboxes/FullBNT-1.0.7/KPMtools/subv2indMinka.m @ 0:e9a9cd732c1e tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
first hg version after svn
author wolffd
date Tue, 10 Feb 2015 15:05:51 +0000
parents
children
rev   line source
wolffd@0 1 function index = subv2indMinka(siz,sub)
wolffd@0 2 %SUBV2IND Linear index from subscript vector.
wolffd@0 3 % SUBV2IND(SIZ,SUB) returns an equivalent single index corresponding to a
wolffd@0 4 % subscript vector for an array of size SIZ.
wolffd@0 5 % If SUB is a matrix, with subscript vectors as rows, then the result is a
wolffd@0 6 % column vector.
wolffd@0 7 %
wolffd@0 8 % This is the opposite of IND2SUBV, so that
wolffd@0 9 % SUBV2IND(SIZ,IND2SUBV(SIZ,IND)) == IND.
wolffd@0 10 %
wolffd@0 11 % See also IND2SUBV, SUB2IND.
wolffd@0 12
wolffd@0 13 % Written by Tom Minka
wolffd@0 14
wolffd@0 15 prev_cum_size = [1 cumprod(siz(1:end-1))];
wolffd@0 16 %index = (sub-1)*prev_cum_size' + 1;
wolffd@0 17 index = sub*prev_cum_size' - sum(prev_cum_size) + 1;