source:
distools/asymmetry.m
@
126
| Last change on this file since 126 was 10, checked in by bduin, 14 years ago | |
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| File size: 327 bytes | |
| Rev | Line | |
|---|---|---|
| [10] | 1 | %ASYMMETRY Estimate asymmetry of dissimilarity matrix |
| 2 | % | |
| 3 | % ASYM = ASYMMETRY(D) | |
| 4 | % | |
| 5 | % The asymmetry is defined as the average over 2*|D-D'|./(|D|+|D'|). | |
| 6 | ||
| 7 | function asym = asymmetry(d) | |
| 8 | ||
| 9 | d = +d; | |
| 10 | e = abs(d-d')./(abs(d)+abs(d')+1e-100); %avoid division by 0 | |
| 11 | L = find(~isnan(e)); | |
| 12 | asym = mean(mean(e(L))); | |
| 13 | ||
| 14 | return |
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