Jacob,
  You might have a look at the vegan package. It might compute the Jaccard 
distance and it might have some other toolsa that you might be interested 
in.
Dave




From:
Flabbergaster <jlunding@gmail.com>
To:
r-help@r-project.org
Date:
12/28/2010 08:26 AM
Subject:
[R] Jaccard dissimilarity matrix for PCA
Sent by:
r-help-bounces@r-project.org




Hi
I have a large dataset, containing a wide range of binary variables.
I would like first of all to compute a jaccard matrix, then do a PCA on 
this
matrix, so that I finally can do a hierarchical clustering on the 
principal
components. 
My problem is, that I don't know how to compute the jaccard dissimilarity
matrix in R? Which package to use, and so on...
Can anybody help me?
Alternatively I'm search for another way to explore the clusters present 
in
my data.
Another problem is, that I have cases with missing values on different
variables.

Jacob 
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