How to find common rows between two dataframe in R?

Question

I would like to make a new data frame which only includes common rows of two separate data.frame. example:

data.frame 1

1 id300
2 id2345
3 id5456
4 i         


        

Answer 1

common <- intersect(data.frame1$col, data.frame2$col)  
data.frame1[common,] # give you common rows in data frame 1  
data.frame2[common,] # give you common rows in data frame 2