> x<-rep(1,10) > y<-rep(c(1,2),c(5,5)) > z<-seq(1:10) > ab<-data.frame(x,y,z) > tapply(ab$z,ab$y,mean) 1 2 3 8
-------Original Message------- From: Heberto Ghezzo <[EMAIL PROTECTED]> Sent: 01/29/03 03:24 PM To: r-help <[EMAIL PROTECTED]> Subject: [R] problems with by() so, how can I get the function(x) to be applied to each level of the index variable y. Actually I use my own function but the same happens, it is applied to all the data and there is no partition of the data acording to index ______________________________________________ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help
