yourDF <- cbind(yourDF, f=yourDF$a+yourDF$b, g=yourDF$a * 3, h=yourDF$c + yourDF$d)
On Wed, Jun 11, 2008 at 9:26 PM, Esmail Bonakdarian <[EMAIL PROTECTED]> wrote: > Hello, I have the following task I'd like to accomplish: > > A file contains 5 columns of data (several hundred rows), let's call > them a, b, c, d and e (ie these are their column headers) > > I also have a set of definitions, e.g., > > f = a + b > g = a * 3 > h = c + d > etc. > > I would like to write out a new .rda file that contains columns > > a b c d e f g h etc. > > I.e. , the original data plus new columns (with headers and data). > > It seems that there ought to be a simple way to do this, could > someone provide some guidance on the best way to accomplish > this task? (I tried a few things as this seemed rather trivial, > but did not succeed. I still hope/assume this is a trivial thing > to do if one knows R well) > > Thanks, > > Esmail > > ps: I want to thank everyone again who posted their solutions > to my previous query. Seeing different solutions for the same > problem is a tremendously effective way to learn something > new. > > ______________________________________________ > 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. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? ______________________________________________ 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.