On 4 Sep 2003, Ulrich Leopold wrote: > could someone point me to the right command to subtract 2 columns in a > data.frame. Might be a bit embarrassing question. But I cannot figure > out how to do this simple command in R.
Suppose your data frame is called foo, and you want the first column minus the second: foo[,1] - foo[,2] -- Cheers, Kevin ------------------------------------------------------------------------------ "On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question." -- Charles Babbage (1791-1871) ---- From Computer Stupidities: http://rinkworks.com/stupid/ -- Ko-Kang Kevin Wang Master of Science (MSc) Student SLC Tutor and Lab Demonstrator Department of Statistics University of Auckland New Zealand Homepage: http://www.stat.auckland.ac.nz/~kwan022 Ph: 373-7599 x88475 (City) x88480 (Tamaki) ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help