Re: [R] Comparing data frames and keeping non-matches

Hi All, I found a solution that give the correct answer.. year <- c(2100:2110) x1 <- c(F,T,T,F,F,F,T,F,T,T,F) df1 <- data.frame(cbind(year, x1)) df1$subject <- c(1,1,1,2,2,3,3,3,3,4,4) df1$match <- 1 df1$key <- paste(df1$subject, df1$match, sep="") ; df1 df2 <- data.frame(cbind(year, x1)) df2$

[R] Comparing data frames and keeping non-matches

Hi R users, I am trying to compare 2 data frames by subject and match and save the no matches to an object called nomatch, but I am getting unexpected results... Can anyone tell me how to correct the code to get the expected results shown in the last table? Many thanks in advance for your any h