Hi JackDavision and Andresrcs
thanks for the help! i have another question
say that I have 4 data frames in R and i want to "map and merge them some of the columns from different df.
df1 = data.frame(OPER = c(1,2,5,6) , LRM = c(11,12,13,14))
df2 = data.frame(CODE = c(5,1,8,9), DUN = c(112,113,114,115)
i need to add map and merge (if that makes sense) OPER to df2 so that the cell from OPER that is = 1 is matched with the cell from CODE = 1.
i have tried the merge function from R without much luck
thanks