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masked by GlobalEnv ???

3 messages · Jhope, R. Michael Weylandt, Martin Maechler

Jhope
# 
Hi R Listers, 

I am trying to upload a data file and I received this message. It seems that
I am still able to make graphs and Aeventexhumed still works in the
analysis. Can I ignore this message or do I need to do something about this? 

Jean
Loading required package: plyr
The following object(s) are masked _by_ '.GlobalEnv':

    Aeventexhumed, DeadHatch, ExDate, Hatchlings, MaxHatch, Oldeggs,
Quadrat,
    QuadratEvent, ST0, ST1, ST2, ST3, ST4, Sector, Shells, TotalEggs

--
View this message in context: http://r.789695.n4.nabble.com/masked-by-GlobalEnv-tp4628664.html
Sent from the R help mailing list archive at Nabble.com.
R. Michael Weylandt
# 
The right response is not to use attach().

What's going on is that you have objects by those names in your global
workspace and in the object you are attaching. Since .GlobalEnv is
always (?) first on the search path, you won't be able to see those
that you just added unless you remove the ones in .GlobalEnv (which
name lookup will find first) Whether this is something you need to do
something about is up to you -- it depends which ones you want to
access.

Still, I'll repeat -- the right answer is don't use attach().

Michael
On Sat, May 12, 2012 at 5:54 AM, Jhope <jeanwaijang at gmail.com> wrote:
Martin Maechler
# 
> The right response is not to use attach().  What's going
    > on is that you have objects by those names in your global
    > workspace and in the object you are attaching. Since
    > .GlobalEnv is always (?) first on the search path, you
    > won't be able to see those that you just added unless you
    > remove the ones in .GlobalEnv (which name lookup will find
    > first) Whether this is something you need to do something
    > about is up to you -- it depends which ones you want to
    > access.

    > Still, I'll repeat -- the right answer is don't use attach().

    > Michael

Thank you Michael.
Specifically, I would slightly change that to say
   "  only use  attach()  instead of  load() "
since the latter overwrites objects in .GlobalEnv,
I do recommend using the former in this case.

Martin Maechler
ETH Zurich and R core Team


    > On Sat, May 12, 2012 at 5:54 AM, Jhope
> <jeanwaijang at gmail.com> wrote:
>> Hi R Listers,
    >> 
    >> I am trying to upload a data file and I received this
    >> message. It seems that I am still able to make graphs and
    >> Aeventexhumed still works in the analysis. Can I ignore
    >> this message or do I need to do something about this?
    >> 
    >> Jean
    >> 
    >>> require(plyr)
    >> Loading required package: plyr
    >>> turtlehatch <- read.csv(file.choose())
    >>> attach(turtlehatch)
    >> The following object(s) are masked _by_ '.GlobalEnv':
    >> 
    >> ? ?Aeventexhumed, DeadHatch, ExDate, Hatchlings,
    >> MaxHatch, Oldeggs, Quadrat, ? ?QuadratEvent, ST0, ST1,
    >> ST2, ST3, ST4, Sector, Shells, TotalEggs
    >> 
    >> --
    >> View this message in context:
    >> http://r.789695.n4.nabble.com/masked-by-GlobalEnv-tp4628664.html
    >> Sent from the R help mailing list archive at Nabble.com.
    >> 
    >> ______________________________________________
    >> 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.