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

[PO SU]

As you know, in the search path, there is .GlobalEnv, package:stats and so on, why do we need to convert the character "package:stats" to the stats environment.
I mean, why don't let package:stats be a environment type object like .GlobalEnv,but let it be a string ?
Hope you understand my meaning for my pool english expression way.





--

PO SU
mail: desolator88 at 163.com
Majored in Statistics from SJTU



At 2014-08-25 09:53:37, "John McKown" <john.archie.mckown at gmail.com> wrote:
>On Mon, Aug 25, 2014 at 1:07 AM, 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
>
>You might want to try:
>
>new_name <- new.env();
># or if you prefer (such as in a function)
>assign("new_name",new.env(),envir=.GlobalEnv);
>#
># You may now assign variable into this similar to:
>new_name$a <- 2;
>gvar <- new_name$a; # get the variable a from environment new_name
>gvar <- get("a",envir=new_name); #same thing, but wordy
>attach(new_name);
>a
>gvar <- a;
>
>
>-- 
>There is nothing more pleasant than traveling and meeting new people!
>Genghis Khan
>
>Maranatha! <><
>John McKown

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