On 05/14/2010 06:35 AM, ecvet...@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.
Hi ecvetano,
The string of names is not too hard:
blank11<-rep("",11)
one_to_fifteen<-c("one","two","three","four","five",
"six","seven","eight","nine","ten","eleven","twelve",
"thirteen","fourteen","fifteen")
newnames<-as.vector(sapply(one_to_fifteen,
function(x,sep) return(c(x,sep)),blank11))
then you want to add blanks at the beginning and end:
nrows<-dim(my.data.frame)[1]
new_column<-c(rep("",97),newnames,
rep("",nrows-(97+length(newnames)))
But I don't see the point.
Jim
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