R join 2 data frames

Question

Hello i would like to know how can i merge 2 data frames in R,there is a merge function ,but i would like to do this :

data frame1
  X Y Z
1  1 1 1  
2  1 1 1
3  1 1 1
4  1 1 1
5  1 1 1

data frame 2
  A B C
1 2 2 2
2 2 2 2
3 2 2 2



mergedataframe
  X Y Z A B C 
1 1 1 1  
2 1 1 1 
3 1 1 1 2 2 2
4 1 1 1 2 2 2
5 1 1 1 2 2 2

the think is i must synchronize 3 csv files (dataframe) and i have no idea how to it with R.

if somebody have any idea about it ,thank u

i redit my post i would like my merged data frame like that :

data frame1

        X Y Z
    1  1 1 1  
    2  1 1 1
    3  1 1 1
    4  1 1 1
    5  1 1 1
    6  1 1 1

data frame 2
  A B C
1 2 2 2
2 2 2 2




mergedataframe
  X Y Z A B C 
1 1 1 1  
2 1 1 1 
3 1 1 1 2 2 2
4 1 1 1 2 2 2
5 1 1 1 
6 1 1 1

Answer 1

df1 <- data.frame(X=rep(1,5),Y=1, Z=1)
df2 <- data.frame(A=rep(2,3),B=2, C=2)
#rownames(df2) <- 3:5
rownames(df2) <- tail(rownames(df1), nrow(df2))

mergedataframe <- merge(df1,df2, by=0, all=TRUE)
mergedataframe <- mergedataframe[,-1]
mergedataframe

  X Y Z  A  B  C
1 1 1 1 NA NA NA
2 1 1 1 NA NA NA
3 1 1 1  2  2  2
4 1 1 1  2  2  2
5 1 1 1  2  2  2