[R] compate tow different data frame

[arun]

Hi,
dat1<- read.table(text="
V1    V2
A      1
B      2
C      1
D      3
",sep="",header=TRUE,stringsAsFactors=FALSE)
dat2<- read.table(text="
V3        V2
AAA       1
BBB       2
CCC       3
",sep="",header=TRUE,stringsAsFactors=FALSE) 
library(plyr)
join(dat1,dat2,by="V2",type="full")
#  V1 V2  V3
#1  A  1 AAA
#2  B  2 BBB
#3  C  1 AAA
#4  D  3 CCC
merge(dat1,dat2)
#  V2 V1  V3
#1  1  A AAA
#2  1  C AAA
#3  2  B BBB
#4  3  D CCC
A.K.

>Dear R-users, 
>
>I have the following 2 files; 
>
>A 
>
>V1    V2 
>A      1 
>B      2 
>C      1 
>D      3 
>
>B 
>
>V1         V2 
>AAA       1 
>BBB       2 
>CCC       3 
>
>
>I want to get this output 
>
>C 
>V1    V2     V3 
>A      1       AAA 
>B      2       BBB 
>C      1       AAA 
>D      3       CCC 
>
>I want to compare A$V2 with B$V2, if it is the same, then append B$V1 to A. 
>
>How to.... ?? 
>
>Please