I see what is happening here. When I am reading the data frame values from a csv file, they are not read as numerics.
_A On Sat, Jan 30, 2010 at 12:29 AM, Abhishek Pratap <abhishek....@gmail.com> wrote: > Hi All > > I am seeing quite a silly thing for which I dont have much of > explanation. I want to take per row mean of 3 columns of a data frame. > What I am getting is all NA in the result. Here is what I am doing > > > apply(a[,1:3],1,mean) > > I get warnings. > > In mean.default(newX[, i], ...) : > argument is not numeric or logical: returning NA > > I am not sure how it thinks the values are not numeric. May be I had a > long day and not able get something fairly obvious. > > ========== > summary(a) > > animal1_wt animal2_wt animal3_wt > 0 : 5448 0 : 5295 0 : > 5501 > 0.232266 : 7 0.17356 : 5 6.22424 : 6 > 1.05487 : 6 0.00630758: 4 0.0395818 : 5 > 0.258336 : 5 0.0131442 : 4 4.14949 : 5 > 0.372308 : 5 0.0143924 : 4 0.00964998: 4 > 0.00926343: 4 0.017208 : 4 0.0172297 : 4 > (Other) :15696 (Other) :15855 (Other) :15646 > ______________________________________________ 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.
