Mercurial > hg > camir-ismir2012
annotate toolboxes/FullBNT-1.0.7/KPMtools/subv2indMinka.m @ 0:cc4b1211e677 tip
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646 (e263d8a21543) added further path and more save "camirversion.m"
| author | Daniel Wolff |
|---|---|
| date | Fri, 19 Aug 2016 13:07:06 +0200 |
| parents | |
| children |
| rev | line source |
|---|---|
| Daniel@0 | 1 function index = subv2indMinka(siz,sub) |
| Daniel@0 | 2 %SUBV2IND Linear index from subscript vector. |
| Daniel@0 | 3 % SUBV2IND(SIZ,SUB) returns an equivalent single index corresponding to a |
| Daniel@0 | 4 % subscript vector for an array of size SIZ. |
| Daniel@0 | 5 % If SUB is a matrix, with subscript vectors as rows, then the result is a |
| Daniel@0 | 6 % column vector. |
| Daniel@0 | 7 % |
| Daniel@0 | 8 % This is the opposite of IND2SUBV, so that |
| Daniel@0 | 9 % SUBV2IND(SIZ,IND2SUBV(SIZ,IND)) == IND. |
| Daniel@0 | 10 % |
| Daniel@0 | 11 % See also IND2SUBV, SUB2IND. |
| Daniel@0 | 12 |
| Daniel@0 | 13 % Written by Tom Minka |
| Daniel@0 | 14 |
| Daniel@0 | 15 prev_cum_size = [1 cumprod(siz(1:end-1))]; |
| Daniel@0 | 16 %index = (sub-1)*prev_cum_size' + 1; |
| Daniel@0 | 17 index = sub*prev_cum_size' - sum(prev_cum_size) + 1; |