Mercurial > hg > camir-aes2014
comparison toolboxes/FullBNT-1.0.7/KPMtools/myintersect.m @ 0:e9a9cd732c1e tip
first hg version after svn
author | wolffd |
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date | Tue, 10 Feb 2015 15:05:51 +0000 |
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-1:000000000000 | 0:e9a9cd732c1e |
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1 function C = myintersect(A,B) | |
2 % MYINTERSECT Intersection of two sets of positive integers (much faster than built-in intersect) | |
3 % C = myintersect(A,B) | |
4 | |
5 A = A(:)'; B = B(:)'; | |
6 | |
7 if isempty(A) | |
8 ma = 0; | |
9 else | |
10 ma = max(A); | |
11 end | |
12 | |
13 if isempty(B) | |
14 mb = 0; | |
15 else | |
16 mb = max(B); | |
17 end | |
18 | |
19 if ma==0 | mb==0 | |
20 C = []; | |
21 else | |
22 %bits = sparse(1, max(ma,mb)); | |
23 bits = zeros(1, max(ma,mb)); | |
24 bits(A) = 1; | |
25 C = B(logical(bits(B))); | |
26 end | |
27 | |
28 %sum( bitget( bitand( cliquesb(i), cliquesb(j) ), 1:52 ) ); |