Mercurial > hg > camir-aes2014
comparison toolboxes/FullBNT-1.0.7/KPMtools/subv2ind.m @ 0:e9a9cd732c1e tip
first hg version after svn
| author | wolffd |
|---|---|
| date | Tue, 10 Feb 2015 15:05:51 +0000 |
| parents | |
| children |
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| -1:000000000000 | 0:e9a9cd732c1e |
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| 1 function 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 %index = subv2indTest(siz,sub); | |
| 14 prev_cum_size = [1 cumprod(siz(1:end-1))]; | |
| 15 %index = (sub-1)*prev_cum_size' + 1; | |
| 16 index = sub*prev_cum_size' - sum(prev_cum_size) + 1; | |
| 17 |