Perhaps this example might help you?
I create 2 sample data.frames, take a look at what they contain and then what the merge function gives. Compare with all = FALSE. df1 <- data.frame(a = 1:10, b = 11:20) df2 <- data.frame(a = c(1:2,98), b = c(11:12, 99)) merge(df1, df2, all = TRUE) Erik Iverson wrote: > You probably need to provide an example here, show us your data.frame > column names, and what you mean by 'common subset of the same data' at > least. What did you try and what did it do that you didn't expect? > > stephen sefick wrote: >> I have a thirty thousand row data frame imported from excel and a >> 60,000 row data frame imported from excel. they share a common subset >> of the same data and I would like to combine the two into one data >> frame merged together on the data in common. I have looked at the >> help file for merge and intersect and cbind and rbind etc... And I >> can't figure it out. Thanks in advance >> >> Stephen >> > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
