Hi, Can you show the results of str() on your original dataframe? Also it would help if you could make an example that demonstrates your problem. I used this little example, and did not notice any problems:
samp.frame <- data.frame(a = 1:10, b = c(3,2,5,3,1,5,NA,4,5,NA)) str(samp.frame) samp.matrix <- data.matrix(samp.frame) str(samp.matrix) Best regards, Josh On Wed, Jul 14, 2010 at 7:18 AM, syrvn <ment...@gmx.net> wrote: > > Hi list, > > I tried to convert a data.frame into a matrix using data.matrix. > Unfortunately my matrix contains missing values (NA) wherefore all columns > including NA's were changed into factors. > > I thought that many people stumbled across that problem already wherefore > there must be a > simple solution. But it seems there isn't. I tried lapply, replace and other > things in combination > but still did not manage to convert my data.frame into a proper matrix with > numeric values. > > Any advice? > Cheers > -- > View this message in context: > http://r.789695.n4.nabble.com/convert-data-frame-to-matrix-NA-factor-problem-tp2288828p2288828.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. > -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ ______________________________________________ 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.
