how to get a value from a list (using paste function)?
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$",lambda.rule)))
On 27.12.2012, at 11:44, Heramb Gadgil wrote:
I am not sure why "Never ever!" Can you please elaborate. What are the negatives about the method Warm Regards, Heramb M. Gadgil On Thu, Dec 27, 2012 at 3:50 PM, Uwe Ligges <ligges at statistik.tu-dortmund.de
wrote:
On 27.12.2012 08:09, Heramb Gadgil wrote:
eval(parse(text=paste0("**cvtest$",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 at 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 at 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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______________________________________________ R-help at 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.