Dear all, I am having trouble creating summary tables using aggregate function.
given the following table: Var1 Var2 Var3 dummy S1 T1 I 1 S1 T1 I 1 S1 T1 D 1 S1 T1 D 1 S1 T2 I 1 S1 T2 I 1 S1 T2 D 1 S1 T2 D 1 S2 T1 I 1 S2 T1 I 1 S2 T1 D 1 S2 T1 D 1 S2 T2 I 1 S2 T2 I 1 S2 T2 I 1 S2 T2 I 1 I want to create a summary table that shows for each category of Var1, Var2, the number of cells that are Var3=D and Var3-I : Var1 Var2 Var3(D) Var3(I) S1 T1 2 2 S1 T2 2 2 S2 T1 2 2 S2 T2 0 4 However, if I do: Count.Cells= aggregate(dummy~ Var1+Var2+Var3, FUN='sum') , I get: Var1 Var2 Var3 Count of Resp S1 T1 D 2 S1 T1 I 2 S1 T2 D 2 S1 T2 I 2 S2 T1 D 2 S2 T1 I 2 S2 T2 I 4 Is there a way to get different columns for each Var3 level? Thank you for any help you can give! [[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.