[R] backticks

[Robin Hankin]

Peter

Aha!  so R backticks work just like bash backticks  (duh!)
unless they are on the LHS of an assignment.

[We bash people now use $(...) instead]

Could we add something to this effect to Quotes.Rd?


rksh


On 4 Dec 2006, at 14:33, Peter Dalgaard wrote:

> Robin Hankin wrote:
>>
[snip]
>> What exactly do backticks do that single or double quotes don't?
>>
> I don't know whether we really want to be that dogmatic about it,  
> but in
> a nutshell
>
> `like this` <- 2
> "like that" <- 3
> print(`like this`)
> print("like that")
>
> I.e. backtick'ed names work whereever ordinary names do, but quoted
> names work only on the LHS of assignments.
>
> The note in ?formula should probably be understood defensively: We
> intend backtick'ed names to work in all contexts, but  there may be
> programming practices where the backticks are not preserved  
> (notably if
> there is a deparse-reparse step involved).
>
>> Where do I look for documentation on this?
>>
>>
>>
>>
>> --
>> Robin Hankin
>> Uncertainty Analyst
>> National Oceanography Centre, Southampton
>> European Way, Southampton SO14 3ZH, UK
>>   tel  023-8059-7743
>>
>> ______________________________________________
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>> 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.
>>
>
>
> -- 
>    O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
>   c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
>  (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45)  
> 35327918
> ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)                  FAX: (+45)  
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--
Robin Hankin
Uncertainty Analyst
National Oceanography Centre, Southampton
European Way, Southampton SO14 3ZH, UK
  tel  023-8059-7743