On 24/12/2007 1:00 AM, [EMAIL PROTECTED] wrote: > Full_Name: richard wright > Version: R version 2.6.1 (2007-11-26) > OS: Mac OS X v 10.4.11 > Submission from: (NULL) (76.240.79.123) > > > I downloaded the most recent version of R for the mac (About: GUI 1.22-devel > (4859) (4859)) and installed it. > After installation, I opened the help file and ran the demo. I am new to R, > although I have over 25 years experience in SAS. > > Below is a part of the job I ran. I think I ran the code correctly, but I seem > to be blowing off. > And, I'm not sure it's related, but I also included what I got when I ran > bug.report() > >> dummy <- data.frame(x=x, y =x+rnorm(x)*w) >> dummy > x y > 1 1 1.425904 > 2 2 -1.083024 > 3 3 -1.976215 > 4 4 4.185795 > 5 5 8.598591 > 6 6 1.004177 > 7 7 5.357826 > 8 8 9.033184 > 9 9 6.455373 > 10 10 8.166066 > 11 11 12.383454 > 12 12 10.823910 > 13 13 14.410394 > 14 14 13.046184 > 15 15 15.912303 > 16 16 13.454527 > 17 17 15.827133 > 18 18 18.586979 > 19 19 10.845216 > 20 20 20.935347 >> fm <-lm(y-x,data=dummy) > Error in switch(mode(x), "NULL" = structure(NULL, class = "formula"), : > invalid formula
This looks like your error, rather than a bug in R. The formula should be "y ~ x" (y tilde x), not "y - x". > In addition: Warning message: > In y - x : longer object length is not a multiple of shorter object length This warning is also a consequence of the typo, in a roundabout way. It is saying that x and y are different lengths, which is clearly not true for the columns of dummy: but because you just subtracted them, it took x and y to be variables in their own right, not columns. Presumably the objects listed below are different lengths. >> ls() > [1] "dummy" "w" "x" "y" >> bug.report() > Error in bug.report() : 'subject' missing Please check on R-help or R-devel first, until you're sure something is a bug. It takes a bit of effort to deal with a bug report regardless of whether it is real or not. Duncan Murdoch ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
