On Fri, 2005-09-16 at 10:34 -0700, Martin Lam wrote: > Hi, > > I was wondering if it's possible to get the row > numbers from a filtering. Here's an example: > > # give me the rows with sepal.length == 6.2 > iris[(iris[,1]==6.2),] > > # output > Sepal.Length Sepal.Width Petal.Length Petal.Width > Species > 69 6.2 2.2 4.5 1.5 > versicolor > 98 6.2 2.9 4.3 1.3 > versicolor > 127 6.2 2.8 4.8 1.8 > virginica > 149 6.2 3.4 5.4 2.3 > virginica > > What I really want is that it return the row numbers: > 69, 98, 127, 149. > > Thanks in advance, > > Martin
?which, as in: > which(iris[ , 1] == 6.2) [1] 69 98 127 149 HTH G > ______________________________________________ > [email protected] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html -- %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% Gavin Simpson [T] +44 (0)20 7679 5522 ENSIS Research Fellow [F] +44 (0)20 7679 7565 ENSIS Ltd. & ECRC [E] gavin.simpsonATNOSPAMucl.ac.uk UCL Department of Geography [W] http://www.ucl.ac.uk/~ucfagls/cv/ 26 Bedford Way [W] http://www.ucl.ac.uk/~ucfagls/ London. WC1H 0AP. %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
