On 25/09/2014 11:46 AM, Jeff Newmiller wrote:
No, masking does not imply inheritance. Simply that "foo" now refers to a different
function, so you have to use "oldpkg::foo" if you want to get at the old function from
your normal working environment.
I haven't read the book (?), but I'd guess what they refer to is the way
that package uses masking, rather than a claim about masking in general.
The cor() function in base R isn't a generic function, but it is masked
by one in the compositions package, which provides a variety of methods
for it. The default method calls the stats::cor function. So in that
sense it really does provide a kind of inheritance.
Duncan Murdoch
Note that packages that call "foo" will continue to find the versions they
intended to call if they are constructed correctly.
---------------------------------------------------------------------------
Jeff Newmiller The ..... ..... Go Live...
DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go...
Live: OO#.. Dead: OO#.. Playing
Research Engineer (Solar/Batteries O.O#. #.O#. with
/Software/Embedded Controllers) .OO#. .OO#. rocks...1k
---------------------------------------------------------------------------
Sent from my phone. Please excuse my brevity.
On September 25, 2014 8:19:14 AM PDT, Rich Shepard <rshep...@appl-ecosys.com>
wrote:
>On Thu, 25 Sep 2014, MacQueen, Don wrote:
>
>> And to answer the “What do I read ...?” question
>> help.search('masked’)
>> returns quite a few things on my system, and the one you want is
>
>Don, et al.:
>
> Further research led me to re-read the beginning of "Analyzing
>Compositional Data with R" where the authors describe the masking as
>analgous (my interpretation) to instatiating an object as in Python or
>wxPython. With the package compositions, there are functions with the
>same
>name as functions in other packages. The compositions package extends
>functionality and implies that the parent functionality is inherited,
>not
>replaced.
>
> Perhaps this is the norm for all R packages.
>
>Thanks very much to all,
>
>Rich
>
>______________________________________________
>R-help@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@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@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.
