Is this what you want: > x <- read.table(text = "ColumnA ColumnB ColumnC + a d d + s s e + e r e + y w y + t u i + q e l", as.is = TRUE, header = TRUE) > x$ColumnC[1:3] <- runif(3) > x ColumnA ColumnB ColumnC 1 a d 0.965288798790425 2 s s 0.722888228250667 3 e r 0.634451690129936 4 y w y 5 t u i 6 q e l >
Now ColumnC is character, so the random numbers are character strings. What is the problem you are trying to solve? On Wed, Feb 15, 2012 at 4:38 AM, Camilo Mora <cm...@dal.ca> wrote: > Hi: > I wonder if anyone may know the answer to this question: > > COnsider the following data frame (DF): > > ColumnA ColumnB ColumnC > a d d > s s e > e r e > y w y > t u i > q e l > > What I need is to replace rows 1 to 3 in ColunmC for a random number? > I tried DF$ColumnC[DF$ColumnC [1:3]] <- .Random.seed[1:3] > but does not work. > > It may be trivial but have not been able to find a solution. > > Thanks, > Camilo > > ______________________________________________ > 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. -- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it. ______________________________________________ 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.
