[R] same key row merge in dataframe

[arun]

HI,
Try this:
dat1<- read.table(text="
V1    V2
A      1
B      2
A     1
B      3 
",sep="",header=TRUE,stringsAsFactors=FALSE)
library(plyr)
ddply(dat1,.(V1),summarize, V2=list(V2))
#  V1   V2
#1  A 1, 1
#2  B 2, 3

#or
aggregate(V2~V1,data=dat1,FUN= function(x) x,simplify=FALSE)
#  V1   V2
#1  A 1, 1
#2  B 2, 3



A.K.


>Dear R-users, 
>
>I have dataframe 
>V1    V2 
>A      1 
>B      2 
>A     1 
>B      3 
>
>I want to get this output 
>
>V1         V2 
>A       1,1 
>B       2 ,3 
>
>
>How to.... ?? 
>
>Please