Thanks a lot, Dimitris! I see - data should be defined precisely as data.frame.
On Mon, Aug 16, 2010 at 2:47 PM, Dimitris Rizopoulos < d.rizopou...@erasmusmc.nl> wrote: > better try it this way: > > DF <- data.frame(y = rnorm(100), x = rchisq(100, df = 3)) > m <- lm(y ~ x, DF) > predict(m, data.frame(x = seq(-13, 13, 0.5))) > > > I hope it helps. > > Best, > Dimitris > > > > On 8/16/2010 2:37 PM, Trafim Vanishek wrote: > >> Dear all, >> >> I have an error in the simple prediction function for lm(). >> Maybe someone experienced the same? >> >> xma<- matrix(data = 0, nrow = 100, ncol = 2) >> xma[, 1]<- rnorm(100) >> xma[, 2]<- rchisq(100, df = 3) >> >> m1<- lm(xma[, 1] ~ xma[, 2]) >> predict(m1, as.data.frame(seq(-13, 13, 0.5))) >> >> >> Thanks a lot, >> Trafim >> >> [[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<http://www.r-project.org/posting-guide.html> >> and provide commented, minimal, self-contained, reproducible code. >> >> > -- > Dimitris Rizopoulos > Assistant Professor > Department of Biostatistics > Erasmus University Medical Center > > Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands > Tel: +31/(0)10/7043478 > Fax: +31/(0)10/7043014 > [[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.
