[R] Adding name to nth row

Erik Iverson eriki at ccbr.umn.edu
Thu May 13 22:55:00 CEST 2010


We need a self-contained, reproducible example of what you have, and 
what you want.

Is this close?

tmp <- data.frame(a = rnorm(278))
tmp$newcol <- ""
tmp[seq(97,278, by = 12), "newcol"] <- "A Name"


ecvetano at uwaterloo.ca wrote:
> Hello,
> 
> I have a data frame with many rows, and I want to create a column with a 
> name only at every 12th row, starting from 97 to 278.
> 
> Thanks in advance!
> 
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> PLEASE do read the posting guide 
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> and provide commented, minimal, self-contained, reproducible code.



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