how to calcualte Jaccard Coefficient

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You could try 'vegdist()' in the 'vegan' package.

Greg.
Does anyone have a good method for calculating Jaccard coefficients now that the dissimilarity() function is no longer an option?

Wen Gu

John Jay College of Criminal Justice445 West 59 StreetNew York, NY 10029
w... at gc.cuny.edu

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Greg <chaoborid <at> gmail.com> writes:
You could try 'vegdist()' in the 'vegan' package.

Yep, you could. However, if you want to have Jaccard for binary data although
your data are not binary, you must set binary = TRUE in vegan::vegdist.

Indeed, the greatest problem with recommending Jaccard is that there is a huge
number of packages that have this index, and you probably forget some of those
in any recommendation. I think at least the following packages have Jaccard
index: ade4, analogue, ecodist, labdsv and probably many more.

Cheers, Jari Oksanen