I want a list of the number of times some factor levels appear together,
Say a and b are the names of the factors:
table(a,b)
table(a:b)
aggregate(a,list(a=a,b=b),length)
Christophe Pallier http://www.pallier.org
______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
