[R] problem with get command [Broadcast]

[Liaw, Andy]

Sorry, couldn't resist...

From: Gabor Grothendieck
> 
> ov$vn1 is not a variable.  It is the result of applying the $ 
> function to the ov and vn1 arguments.

... which would suggest: get("$")(get("ov"), "vn1").  8-)

Andy

 
> For example, using BOD which is a data frame that comes with 
> R, rather than get("BOD$Time") use get("BOD")[["Time"]]
> 
> On 4/26/06, Thomas Davidoff <davidoff at haas.berkeley.edu> wrote:
> > I don't understand what my error is in the following:
> > I need to use the get command on a series of variables, but 
> can't for 
> > some reason that I don't understand.  Why am I told no such 
> variable 
> > as ov$vn1 after getting a summary report on that very variable?
> > > summary(ov$vn1)
> >     Min.  1st Qu.   Median     Mean  3rd Qu.     Max.     NA's
> >      1.0     25.0     81.0    468.1    450.0 159100.0   6050.0
> > > dvars <- paste("ov$dvn", 1:4, sep="")
> > > vars <- c("ov$vn1","ov$vn2","ov$vn3","ov$vn4")
> > > summary(get(vars[1]))
> > Error in get(x, envir, mode, inherits) : variable "ov$vn1" was not 
> > found Execution halted
> >
> >
> >
> > Thomas Davidoff
> > Assistant Professor
> > Haas School of Business
> > UC Berkeley
> > Berkeley, CA 94618
> > Phone:    (510) 643-1425
> > Fax:    (510) 643-7357
> > email:    davidoff at haas.berkeley.edu
> > web:    http://faculty.haas.berkeley.edu/davidoff/
> >
> > ______________________________________________
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> 
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