There is also another fortune:

> fortune('toad')

The problem here is that the $ notation is a magical shortcut and like any
other magic if used incorrectly is likely to do the programmatic equivalent
of
turning yourself into a toad.
   -- Greg Snow (in response to a user that wanted to access a column whose
      name is stored in y via x$y rather than x[[y]])
      R-help (February 2012)



On Thu, Dec 27, 2012 at 5:33 AM, jim holtman <jholtman@gmail.com> wrote:

> it is also a fortune.
>
> > fortune('parse')
>
> If the answer is parse() you should usually rethink the question.
>    -- Thomas Lumley
>       R-help (February 2005)
>
>
>
> On Thu, Dec 27, 2012 at 5:44 AM, Heramb Gadgil <heramb.gadgil@gmail.com>
> wrote:
> > I am not sure why "Never ever!"
> >
> > Can you please elaborate. What are the negatives about the method
> >
> > Warm Regards,
> > Heramb M. Gadgil
> >
> >
> > On Thu, Dec 27, 2012 at 3:50 PM, Uwe Ligges <
> ligges@statistik.tu-dortmund.de
> >> wrote:
> >
> >>
> >>
> >> On 27.12.2012 08:09, Heramb Gadgil wrote:
> >>
> >>> eval(parse(text=paste0("**cvtest$",lambda.rule)))
> >>>
> >>
> >> No, never ever!
> >>
> >> There is an R idiom made for it:
> >>
> >> cvtest[[lambda.rule]]
> >>
> >> Uwe Ligges
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>  I hope this works.
> >>>
> >>> On Wed, Dec 19, 2012 at 12:57 AM, Thomas Stewart
> >>> <tgs.public.mail@gmail.com>**wrote:
> >>>
> >>>  Soyeon-
> >>>>
> >>>> A possible solution:
> >>>>
> >>>> get(lambda.rule,envir=**list2env(cvtest))
> >>>>
> >>>>
> >>>> On Tue, Dec 18, 2012 at 12:34 PM, Soyeon Kim <yunni0731@gmail.com>
> >>>> wrote:
> >>>>
> >>>>  Dear my R friends,
> >>>>>
> >>>>> I want to get a number from a list using paste function.
> >>>>> In my example,
> >>>>> lambda.rule <- "lambda.1se"
> >>>>> cvtest is a list (result from cv.glmnet)
> >>>>> and
> >>>>> cvtest$lambda.1se
> >>>>> [1] 1.308973
> >>>>>
> >>>>> I want to call the value using paste function.
> >>>>> I used get function but there was an error.
> >>>>> test <-  get(paste("cvtest$",lambda.**rule, sep=""))
> >>>>> Error in get(paste("cvtest$", lambda.rule, sep = "")) :
> >>>>>    object 'cvtest$lambda.1se' not found
> >>>>>
> >>>>> Do you guys know how to solve this issue?
> >>>>>
> >>>>> Thank you so much in advance and merry Christmas!
> >>>>>
> >>>>> Soyeon
> >>>>>
> >>>>> ______________________________**________________
> >>>>> R-help@r-project.org mailing list
> >>>>> https://stat.ethz.ch/mailman/**listinfo/r-help<
> 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.
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>          [[alternative HTML version deleted]]
> >>>>
> >>>> ______________________________**________________
> >>>> R-help@r-project.org mailing list
> >>>> https://stat.ethz.ch/mailman/**listinfo/r-help<
> 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.
> >>>>
> >>>>
> >>>         [[alternative HTML version deleted]]
> >>>
> >>> ______________________________**________________
> >>> R-help@r-project.org mailing list
> >>> https://stat.ethz.ch/mailman/**listinfo/r-help<
> 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.
> >>>
> >>>
> >
> >         [[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.
>
>
>
> --
> Jim Holtman
> Data Munger Guru
>
> What is the problem that you are trying to solve?
> Tell me what you want to do, not how you want to do it.
>
> ______________________________________________
> 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.
>



-- 
Gregory (Greg) L. Snow Ph.D.
538280@gmail.com

	[[alternative HTML version deleted]]


