kiotoqq wrote
I want to add a shorter column to my dataset with the function merge,
it
should be filled with NAs wo be as long as the other colums, like this:
idage
946
856
6 52
5 NA
4 NA
3 NA
1 NA
i did this:
pa1 - merge(pa1, an1, by=mergeid)
and it says
Hi,
You could use sort=FALSE in ?merge()
d1-data.frame(id=c(9,8,6,5,4,3,1))
d2-data.frame(id=c(9,8,6),age=c(46,56,52))
d-merge(d1,d2,all.x=TRUE,sort=FALSE)
#or
library(plyr)
join(d1,d2,by=id,type=full)
# id age
#1 9 46
#2 8 56
#3 6 52
#4 5 NA
#5 4 NA
#6 3 NA
#7 1 NA
A.K.
-
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