[R] Fwd: help with "by" command

amalka amalka at gmail.com
Tue Aug 30 22:00:16 CEST 2011


Thanks very much for the help.

I ended up getting it to work with one small change:

by(foo, foo$V2, function(foo) mean(foo$trust, na.rm=T)) 

thanks again,
Ari

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