Mercurial > hg > camir-ismir2012
annotate toolboxes/FullBNT-1.0.7/KPMstats/sample.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 x = sample(p, n) |
| Daniel@0 | 2 % SAMPLE Sample from categorical distribution. |
| Daniel@0 | 3 % Returns a row vector of integers, sampled according to the probability |
| Daniel@0 | 4 % distribution p. |
| Daniel@0 | 5 % Uses the stick-breaking algorithm. |
| Daniel@0 | 6 % Much faster algorithms are also possible. |
| Daniel@0 | 7 |
| Daniel@0 | 8 if nargin < 2 |
| Daniel@0 | 9 n = 1; |
| Daniel@0 | 10 end |
| Daniel@0 | 11 |
| Daniel@0 | 12 cdf = cumsum(p(:)); |
| Daniel@0 | 13 for i = 1:n |
| Daniel@0 | 14 x(i) = sum(cdf < rand) + 1; |
| Daniel@0 | 15 end |