Duncan Murdoch <murdoch.dun...@gmail.com> writes: > On 28/03/2014, 7:01 AM, Rainer M Krug wrote: >> Hi >> >> I would like to use namespaces outside packages, but I could not find >> any references on how to do it (only a thread [1] which says "use a >> package"). Using a package is not possible in my case, as I am passing >> variables from org-mode / emacs to R and would like to avoid name >> clashes. This is a dynamic process, and each time the code is evaluated, >> the variable can be different. >> >> I am putting them at the moment into an environment which is locked, but >> I would like to avoid name clashes, so the idea of using environments. >> >> So: is there a way to create a namespace and populate it as I can do >> with an environment? > > I don't know what you think is the difference between a namespace and > an environment. I would say a namespace is one of the environments > associated with a package, i.e. it's just an environment in a > particular context. > > So depending on what you are trying to accomplish, it may be fine to > just set up an environment. Why do you think that won't work?
An environment is what I use at the moment, but there is one aspect I
was not happy with: accessing the original value in the environment when
it is overwritten in a higher environment in the search path. But then I
discovered then notation of using $:
,----
| env <- new.env()
| assign("value", 99, env)
| attach(env)
| value <- FALSE
| value
| env$value
`----
So I can access the original value. I only thought initially about
the :: (or is it :::) to access the objects in a namespace, which do not
work for an environment.
So: Different solution and works perfectly.
Thanks,
Rainer
>
> Duncan Murdoch
>
--
Rainer M. Krug
email: Rainer<at>krugs<dot>de
PGP: 0x0F52F982
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