[R] What the difference between .Golbalenv and package:base?

[Jeff Newmiller]

I would refer to base::somename or stat::somename if necessary, and I never use attach, get or assign.
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Sent from my phone. Please excuse my brevity.

On August 25, 2014 9:07:58 PM PDT, PO SU <rhelpmaillist at 163.com> wrote:
>First, sorry for my pool english expression which make you
>misunderstanding of my original purpose.
>
>Sometimes, suppose  a object in both stats and base, then i type the
>object name, then after R search the search() list, R will use the
>object in stats, is it right?( I just suppose, stats can be any package
>which libraried into R.)
>Then i know that, .GlobalEnv or globalenv() is the global environment
>object, baseenv() returns the base environment object.
>I also know that, i can convert the environment name into the real
>environment object by using stats<-as.environment("package:stats"),
> And the stats environment's name can be obtained using
>environmentName(stats), but it returns "".   (why?)
>Then i use  environmentName(.GlobalEnv) then i get "R_GlobalEnv", then
>i use as.environment("R_GlobalEnv"), it does't work.(why?)
>
>
>In one word, as.environment(x), x is somthing not the environment's
>name. 
>
>
>But, when i add a environment into the search() list, after i
>attr(newenvir,"name")<-"new_name"
>I can use the  as.environment("new_name") to obtain the added
>environment. (why?)
>
>
>Hope you understand my meaning :)
>
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>--
>
>PO SU
>mail: desolator88 at 163.com 
>Majored in Statistics from SJTU
>
>
>
>At 2014-08-26 02:51:54, "MacQueen, Don" <macqueen1 at llnl.gov> wrote:
>>Put simply,
>>   .GlobalEnv    stores objects you create
>>   package:base  contains functions and objects provided by R itself
>>
>>You don¹t need to use   .GlobalEnv$a   to use the variable named a.
>Just
>>is ³a² by itself.
>>
>> a <- 4
>> b <- 2*a
>>print(a)
>>print(b)
>>
>>Not necessary to use
>>  print(.GlobalEnv$a)
>>
>>Similarly, to find an object in the base package, just type its name.
>>
>>I don¹t know what you are trying to do, or why you think you have to
>use
>>.GlobalEnv$a   
>>But in more than 20 years of using R for many different tasks, I have
>>never had to do that.
>>
>>Furthermore, if you are new to R (which I would guess is the case), it
>>seems unlikely to me that you need to work with environments or use
>>attach() or assign(). In the vast majority of cases there are simpler
>ways
>>that are easier to understand.
>>
>>You are aware, I hope, that
>>  > ls('.GlobalEnv')
>>  > ls(1)
>>  > ls()
>>all return the same result?
>>
>>
>>-- 
>>Don MacQueen
>>
>>Lawrence Livermore National Laboratory
>>7000 East Ave., L-627
>>Livermore, CA 94550
>>925-423-1062
>>
>>
>>
>>
>>
>>On 8/24/14, 11:07 PM, "PO SU" <rhelpmaillist at 163.com> wrote:
>>
>>>
>>>
>>>Dear rusers,
>>>
>>>    As we know, there are a lot of environments in the search() path,
>>>such as   .Golbalenv and package:base .
>>>And  i can just use  .Golbalenv$a ,.Golbalenv$b to use the virable, 
>but
>>>i must use as.envrionment("package:base") to find virable, i feel it
>not
>>>very convenient.
>>>
>>>
>>>For example, when i use the following codes to add a new env into the
>>>search() path.
>>>
>>>
>>>
>>>> tmp<-attach(NULL,name="new_name")
>>>> assign("a",2,envir=as.environment("new_name"))
>>>> a
>>>[1] 2
>>>> as.environment("new_name")$a
>>>[1] 2
>>> I must always convert the name to the environment, How can i just
>use
>>>the following form:
>>>
>>>
>>>
>>>> tmp<-attach(NULL,name="new_name")
>>>> assign("a",2,envir=new_name)   #like using  .GlobalEnv
>>>> a
>>>[1] 2
>>>> new_name$a
>>>
>>>[1] 2
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>--
>>>
>>>PO SU
>>>mail: desolator88 at 163.com
>>>Majored in Statistics from SJTU
>>>______________________________________________
>>>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.
>>
>______________________________________________
>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.