Have a look at rbind.fill() in the reshape library. This will return a data.frame not a matrix but you can always convert it to a matrix.
--- zhihuali <[EMAIL PROTECTED]> wrote: > > Hi netters, > Suppose I have two data frames X and Y. X has three > colnames A, B and C. Y has three colnames A,B and D. > > I want to combine them into one matrix, joining the > rows having the same A and B values (X$A==Y$A and > X$B = Y$B). So the resulting dataframe has four > variables/columns: A,B,C and D. > > I was wondering what's the best way to do it in R. > Could anyone give me some advice? > > Thanks! > > Zhihua Li > > > _________________________________________________________________ > ÊÖ»úÒ²ÄÜÉÏ MSN ÁÄÌìÁË£¬¿ìÀ´ÊÔÊÔ°É£¡ > > [[alternative HTML version deleted]] > > > ______________________________________________ > 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.
