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Suppose I have two data frames A and B A has three variables and B also has three variables. I would like to merge these two database but the requirement to merge is that the value of the second column in database A is less than the value of the second column in database B. Is there a R code to do this? Thanks Dataframe A: V1a V2a V3a 1 2 3 5

Hi, How to install sqldf to R with version 2.10? I used the R in the cluster of university and there seems no way to update the R version to 2.14. However, I do need sqldf. I tried to install and there is the problem of namespace. How could I solve the problem of namespace and run sqldf on R with version 2.10? Thank you! Best, [[alternative HTML version deleted]]

Hi everyone, I have a question for R code to merge. Say I have two dataframes: File1 is: V1 V2 V3 V4 1 100 101 name1 2 200 201 name2 2 300 301 name3 3 400 401 name4 3 500 501 name5 4 600 601 name6 4 700 701 name7 File2 is: V1 V2 V3 V4 1 50 55 p1 3 402 449 p2 4 550 650 p3 4 651 660