[R] Is it a bug in list() behavior?

[Uwe Ligges]

wolski wrote:
> Hello!
> 
> let:
> 
> test<-1:3
> list(test)
> names(test)<-c("X11","X12","Y23")
> 
>>test[["Y2"]]
> 
> 3
> 
> I had assumed that the names in a list are like a keys in a hash.
> Therefore i thought that no value should be returned.
> 
> The behavior of:
> 
> 
>>test["Y2"]
> 
> <NA> 
>   NA 
> 
> is as i expected.
> 
> 
> Should it be as it is? How is the definition of [[]] and []?

No! See "An Introduction to R", Section 6.1:
"The names of components may be abbreviated down to the minimum number 
of letters needed to identify them uniquely. Thus Lst$coefficients may 
be minimally specified as Lst$coe and Lst$covariance as Lst$cov."

Uwe Ligges