I have the initial matrice: > *data.frame(Subject=rep(100:101, each=4), Quarter=rep(paste("Q",1:4, sep=""),2), Boolean = rep(c("Y","N"),4))* Subject Quarter Boolean 1 100 Q1 Y 2 100 Q2 N 3 100 Q3 Y 4 100 Q4 N 5 101 Q1 Y 6 101 Q2 N 7 101 Q3 Y 8 101 Q4 N ... >
And I would like to group the Subject by Quarter using as a result in the table the value of the third variable (Boolean). The final result would give: Subjet Q1 Q2 Q3 Q4 1 100 Y Y Y Y 2 101 N N N N ... > I started using the *table(Subject, Quarter)* but can't find a way to correspond the Boolean information in the table.... Thanks in advance for the ideas... Pascal Candolfi [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.