Mercurial > hg > camir-aes2014
annotate toolboxes/FullBNT-1.0.7/KPMtools/find_equiv_posns.m @ 0:e9a9cd732c1e tip
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 p = find_equiv_posns(vsmall, vlarge) |
| wolffd@0 | 2 % FIND_EQUIV_POSNS p[i] = the place where vsmall[i] occurs in vlarge. |
| wolffd@0 | 3 % p = find_equiv_posns(vsmall, vlarge) |
| wolffd@0 | 4 % THE VECTORS ARE ASSUMED TO BE SORTED. |
| wolffd@0 | 5 % |
| wolffd@0 | 6 % e.g., vsmall=[2,8], vlarge=[2,7,8,4], p=[1,3] |
| wolffd@0 | 7 % |
| wolffd@0 | 8 % In R/S, this function is called 'match' |
| wolffd@0 | 9 |
| wolffd@0 | 10 %if ~mysubset(vsmall, vlarge) |
| wolffd@0 | 11 % error('small domain must occur in large domain'); |
| wolffd@0 | 12 %end |
| wolffd@0 | 13 |
| wolffd@0 | 14 if isempty(vsmall) | isempty(vlarge) |
| wolffd@0 | 15 p = []; |
| wolffd@0 | 16 return; |
| wolffd@0 | 17 end |
| wolffd@0 | 18 |
| wolffd@0 | 19 bitvec = sparse(1, max(vlarge)); |
| wolffd@0 | 20 %bitvec = zeros(1, max(vlarge)); |
| wolffd@0 | 21 bitvec(vsmall) = 1; |
| wolffd@0 | 22 p = find(bitvec(vlarge)); |
| wolffd@0 | 23 |
| wolffd@0 | 24 %p = find(ismember(vlarge, vsmall)); % slower |