I exactly know my problem. The read.table by default reads my data from few columns as factors/character type. Can you please give me an example of how to force it to read these columns as numbers. I dont see example of how to use (as.is)
Thanks! -Abhi On Sat, Jan 30, 2010 at 12:34 AM, Abhishek Pratap <abhishek....@gmail.com> wrote: > 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.
