EcoFranc, di you remember to use the argument header=TRUE ?
If not, the variable name is interpreted as data and will flip you into factor rather than numeric. On Mon, Nov 26, 2012 at 12:15 PM, jim holtman <jholt...@gmail.com> wrote: > Also when reading a CSV file, if you do not want characters columns > converted to factors, use 'as.is = TRUE' as one of the parameters. If > you have a column that is a factor, to convert it to numeric you have > to do the following: > > as.numeric(as.character(factorColumn)) > > notice that you have to convert it to character first; otherwise you > will get the numeric value of the factor which is probably not what > you want. > > On Mon, Nov 26, 2012 at 12:02 PM, Sarah Goslee <sarah.gos...@gmail.com> > wrote: > > Most likely there's something amiss in your csv file: R won't convert > > numeric data to factors unless there are non-numeric characters > > included. > > > > First check your csv file for errors. If that doesn't solve your > > problem, please provide a reproducible example. > > > http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example > > > > Sarah > > > > On Mon, Nov 26, 2012 at 10:59 AM, EcoFranc <rob...@gmx.de> wrote: > >> Hi, > >> > >> maybe somebody would be kind enough to help a bloody and unprofessional > >> beginner like me (and I hope I did not overlook the answer to my > question on > >> the website). I've imported a csv data frame into R, but I can't run a > >> regression because R interprets 4 out of 5 variables as factors (rather > than > >> numeric vectors). I tried the as.numeric() command, but R says it is > invalid > >> to change the storage mode of a factor. Is there any way to change the > mode > >> of a factor into numeric. > >> > >> I am very grateful for help. Thank you very much, Robert. > >> > >> > > > > > > -- > > Sarah Goslee > > http://www.functionaldiversity.org > > > > ______________________________________________ > > 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. > > > > -- > Jim Holtman > Data Munger Guru > > What is the problem that you are trying to solve? > Tell me what you want to do, not how you want to do it. > > ______________________________________________ > 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. > [[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.
