Your post seems to be messed up but I will assume you have a 5 column data frame and the questino is how to run f on the first three columns and separately on the last two. I think the easiest is just the following where I have used the builtin iris data set where I have assumed that the operation you want to perform is summary for purposes of example:
summary(iris[,1:3]) summary(iris[,4:5]) If this is not your real problem and the real problem has many more divisions then try this where div is a factor that defines the division of columns into sets: div <- factor(c(1,1,1,2,2)) lapply(split(names(iris), div), function(n) summary(iris[n])) On 1/31/06, Stephane CRUVEILLER <[EMAIL PROTECTED]> wrote: > Hi, > > I would like to perform computations on some variables belonging to the same > dataframe. For instance my data frame has the following shape: > toto1toto2toto3toto4toto5 > 1 12345 > 2678910 > > I would like to perform the calculation on c("toto1","toto2","toto3") and then > the same calculation on c("toto4","toto5"). Is there a way to tell R to do it > using 3 loop (a list of lists)?? > > Stephane. > -- > ========================================================== > Stephane CRUVEILLER Ph. D. > Genoscope - Centre National de Sequencage > Atelier de Genomique Comparative > 2, Rue Gaston Cremieux CP 5706 > 91057 Evry Cedex - France > Phone: +33 (0)1 60 87 84 58 > Fax: +33 (0)1 60 87 25 14 > EMails: [EMAIL PROTECTED] ,[EMAIL PROTECTED] > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html