I don't see the problem here. We only want to compare two items so Jaccard and Tanimoto are identical.
Could you file a JIRA and suggest a javadoc patch? Why did this take you to an ancient journal instead of Wikipedia? On Apr 7, 2013, at 6:54 AM, James Endicott wrote: > As far as I can tell, the difference between the two is that the Jaccard > similarity can only be used to compare two items using the formula: > items appearing in both documents/(items just appearing in one + items just > appearing in the other + items appearing in both) > But the Tanimoto similarity measure allows for comparing between any number > of items by generalizing the formula to: > items appearing in all documents/(items just appearing in one + items just > appearing in another + ... + items appearing in some but not all + ... + > items appearing in all) > > I think the class could be generalized to implement the full Tanimoto > similarity without too much difficulty (though I don't think it's a high > priority) but at the moment it does not do so. While I realize this is > probably a trivial matter, I hope the docs get updated at some point so > another grad student doesn't have to muddle through a botany article in a > Swiss journal from 1901 again.
