Hi I am a new R user.
I have two CSV files, one with daily stock returns using method A {date, stock, returnA, some uninteresting columns}, and another with method B {date, stock, returnB, more columns}. Both have different sets of stocks. I want to combine the two into a single data table, so that I can run some analyses for the overlapping date ranges and stocks. I know how to do this using a database but is there an equivalent way to perform a similar kind of join in R? Data size is small - just a few years worth of daily data. Would appreciate your help. Thanks a lot Dinesh ______________________________________________ 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.