On 2011-02-22 14:48, Nicolas Gutierrez wrote:
Hi All,
I have a data frame "pop":
> id xloc yloc size
> 1 1 10 12 95
> 2 2 11 10 81
And I want to add the vector "rec" to the data frame "n" times (without
using a loop):
> rec=c(3, 5, 5, 10)
> n=2
The result I want:
> id xloc yloc size
> 1 1 10 12 95
> 2 2 11 10 81
> 3 3 5 5 10
> 4 3 5 5 10
I know I can use pop=rbind(pop, rec) to add the vector "rec" once. What
about adding the same vector "n" times without a for loop? Any hints?
Try this:
popm <- as.matrix(pop)
recm <- matrix(rep(rec, n), nr=n, byrow=TRUE)
newpop <- data.frame(rbind(popm, recm))
Peter Ehlers
THANKS!
Nico
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