[R-pkg-devel] Referring to data in R/sysdata.rda

[Spencer Graves]

On 2017-04-15 11:24 AM, Hadley Wickham wrote:
> Just ignore it.
> Hadley
>
> On Friday, April 14, 2017, Roy Mendelssohn - NOAA Federal <
> roy.mendelssohn at noaa.gov> wrote:
>
>> In my package I have a dataframe that I use but want to hide from the
>> user.  In Hadley's book on R Packages,  he says:
>>
>>>        • If you want to store parsed data, but not make it available to
>> the user, put it in R/sysdata.rda. This is the best place to put data that
>> your functions need.
>> I have done that,  and sure enough when the package is loaded, the
>> structure is there.  However,  when I am working on debugging code, and I
>> refer to the  structure in a function,  RStudio gives a warning that the
>> structure is out of scope, say the data frame is myDF:
>>
>> myFunc  <-  function(myIndex) {
>>       junk  <-  myDF[index]
>>      return(junk)
>> }

       Have you tried the following:


> myFunc  <-  function(myIndex) {
>       junk  <-  yrPkg:::myDF[index]
>      return(junk)
> }


       This will turn of similar messages is slightly different 
contexts.  I don't know if it will work here (and I don't have time to 
try it myself now).  Spencer Graves

>> RStudio will warn that myDF is out of scope.  My question is if there is a
>> proper way to refer to myDF so as not to get the warning,  or just ignore
>> it.  Basically before submission I try to remove all warnings from the
>> editor,  even style ones,  just to have things cleaner.
>>
>> Thanks,
>>
>> -Roy
>>
>>
>>
>>
>>
>> **********************
>> **********************
>> "The contents of this message do not reflect any position of the U.S.
>> Government or NOAA."
>> **********************
>> Roy Mendelssohn
>> Supervisory Operations Research Analyst
>> NOAA/NMFS
>> Environmental Research Division
>> Southwest Fisheries Science Center
>> ***Note new street address***
>> 110 McAllister Way
>> Santa Cruz, CA 95060
>> Phone: (831)-420-3666
>> Fax: (831) 420-3980
>> e-mail: Roy.Mendelssohn at noaa.gov <javascript:;> www:
>> http://www.pfeg.noaa.gov/
>>
>> "Old age and treachery will overcome youth and skill."
>> "From those who have been given much, much will be expected"
>> "the arc of the moral universe is long, but it bends toward justice" -MLK
>> Jr.
>>
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>
>