Will something like this work for you: > x <- cbind(runif(10), runif(10)) > x [,1] [,2] [1,] 0.26550866 0.2059746 [2,] 0.37212390 0.1765568 [3,] 0.57285336 0.6870228 [4,] 0.90820779 0.3841037 [5,] 0.20168193 0.7698414 [6,] 0.89838968 0.4976992 [7,] 0.94467527 0.7176185 [8,] 0.66079779 0.9919061 [9,] 0.62911404 0.3800352 [10,] 0.06178627 0.7774452 > x[which.max(x[,2]),1] [1] 0.6607978 >
On Tue, Dec 29, 2009 at 1:48 PM, Wade Wall <wade.w...@gmail.com> wrote: > Hi all, > > I have two columns of data, the first consists of parameter estimates and > the second probability estimates. I would like to extract the value from > the first column based on the max value of column two, but not sure how to > do this other than by extracting the value and then manually finding the > value in the first column. Anyone know how to do this? Basically, I need > to find the row number for the maximum in column two and use that value to > extract the value at the same row number in column one. > > Thanks for any help, > > Wade > > [[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<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 that you are trying to solve? [[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.