[Rd] Errors in demo (PR#10527)

[ripley at stats.ox.ac.uk]

I have no idea what 'demo' this is.  When I open R it says

   Type 'demo()' for some demos, 'help()' for on-line help, or
   'help.start()' for an HTML browser interface to help.

and this is none of those.  At a guess you meant

x <- 1:20
w <- 1 + sqrt(x)/2
dummy <- data.frame(x=x, y= x + rnorm(x)*w)
dummy
fm <- lm(y ~ x, data=dummy)

from the 'sample session' in 'An Introduction to R'.  In which case, this 
is your own typing error (- for ~, and we do put spaces in to make it 
easier to read).

Please do read the R FAQ *before* 'blowing off' a false report.

On Mon, 24 Dec 2007, rcwright at texas.net 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
> In addition: Warning message:
> In y - x : longer object length is not a multiple of shorter object length
>> ls()
> [1] "dummy" "w"     "x"     "y"
>> bug.report()
> Error in bug.report() : 'subject' missing
>>
>
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>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595