Re: [R] How to subsetting data based on factor levels

Thanks a lot! Cc: R help Sent: Tuesday, March 19, 2013 8:39 PM Subject: Re: [R] How to subsetting data based on factor levels levels(group) #[1] "A" "C"  levels(group)=="A" #[1]  TRUE FALSE a[,group=="A"] # A

Re: [R] How to subsetting data based on factor levels

levels(group) #[1] "A" "C"  levels(group)=="A" #[1]  TRUE FALSE a[,group=="A"] # A AB #[1,] 1  6 #[2,] 2  7 #[3,] 3  8 #[4,] 4  9 #[5,] 5 10 a[,group=="C"] #  C CD #[1,] 11 16 #[2,] 12 17 #[3,] 13 18 #[4,] 14 19 #[5,] 15 20 a[,match(group,levels(group))==1] # A AB #[1,] 1  6 #[2,] 2  7