Agreed.
But the initial question was to get the output with paste function. That is
the reason why I went for eval.
Please let me know in case I am going the wrong way
On Thu, Dec 27, 2012 at 4:34 PM, Jessica Streicher <j.streic...@micromata.de
> wrote:
> Well for one, if ever someone looks at your code, cvtest[[lambda.rule]] is
> much easier to read and understand than
> eval(parse(text=paste0("cvtest$",lambda.rule)))
>
>
> On 27.12.2012, at 11:44, Heramb Gadgil wrote:
>
> > I am not sure why "Never ever!"
> >
> > Can you please elaborate. What are the negatives about the method
> >
> > Warm Regards,
> > Heramb M. Gadgil
> >
> >
> > On Thu, Dec 27, 2012 at 3:50 PM, Uwe Ligges <
> lig...@statistik.tu-dortmund.de
> >> wrote:
> >
> >>
> >>
> >> On 27.12.2012 08:09, Heramb Gadgil wrote:
> >>
> >>> eval(parse(text=paste0("**cvtest$",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.m...@gmail.com>**wrote:
> >>>
> >>> Soyeon-
> >>>>
> >>>> A possible solution:
> >>>>
> >>>> get(lambda.rule,envir=**list2env(cvtest))
> >>>>
> >>>>
> >>>> On Tue, Dec 18, 2012 at 12:34 PM, Soyeon Kim <yunni0...@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
> >>>>>
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