I have the following two mapping data frames (r) and (h). I want to
fill teh value of r$seid with the value of r$seid where r$cid==h$cid.
I can do it with sapply as such:
r$seid = sapply(r$cid, function(cid) h[h$cid==cid,]$seid)
Is ther a better (faster) way to do this?
r -
I don't know if its faster but you could try timing this to find out:
r$seid - merge(h, r, by = cid)[,2]
On 8/27/05, Omar Lakkis [EMAIL PROTECTED] wrote:
I have the following two mapping data frames (r) and (h). I want to
fill teh value of r$seid with the value of r$seid where r$cid==h$cid.
