Re: [R] Summarizing elements for a data.frame

2012-12-18 Thread John Kane
0 > To: r-help@r-project.org > Subject: [R] Summarizing elements for a data.frame > > Hello again, let say we have following data: > > Dat1 <- structure(list(factor.sample.LETTERS.1.3...6..replace...T.. = > structure(c(1L, > 3L, 2L, 1L, 3L, 3L), .Label = c("A",

Re: [R] Summarizing elements for a data.frame

2012-12-18 Thread arun
a  b #A 4  3 #B 3 NA #C 6  7 A.K. - Original Message - From: Christofer Bogaso To: r-help Cc: Sent: Tuesday, December 18, 2012 9:36 AM Subject: [R] Summarizing elements for a data.frame Hello again, let say we have following data: Dat1 <- structure(list(factor.sam

Re: [R] Summarizing elements for a data.frame

2012-12-18 Thread Jorge I Velez
Hi Christofer, Check ?tapply, ?aggregate and ?ave. Here is a way of doing in using the first function: tapply(Dat1[, 3], list(Dat1[,1], Dat1[,2]), sum, na.rm = TRUE) HTH, Jorge.- On Wed, Dec 19, 2012 at 1:36 AM, Christofer Bogaso <> wrote: > Dat1 <- structure(list(factor.sample.LETTERS.1.3..