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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>>>>>
>>>>>
>>>>>
>>>>>
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