Thanks a lot Frank,
One last question, though. I was tempted to remove all attributes of my
variables after the sasxport.get call using
foo <- sasxport.get(...)
foo <- as.data.frame(lapply(unclass(foo),as.vector))
Since I never worked with the objects of class 'labeled', I was
wondering what I will loose by removing this attribute.
*Sebastien Bihorel, PharmD, PhD*
PKPD Scientist
Cognigen Corp
Email: sebastien.bihorel at cognigencorp.com
<mailto:sebastien.bihorel at cognigencorp.com>
Phone: (716) 633-3463 ext. 323
Frank E Harrell Jr wrote:> Sebastien.Bihorel at cognigencorp.com wrote:
>> The problem is actually not related to a broken command but a attempt
of
>> operational qualification of R. A few years ago, my company developed a
>> set of scripts for the 'operational qualification' of Splus. We
are
>> switching to R so I am currently trying to port the scripts to R.
>> All Splus scripts imported SAS data using the importData function,
>> which I
>> substituted by sasxport.get. One particular script returns the class of
>> each variable of the imported data frame; the output must match the
>> expected values: numeric, factor, integer, etc... The R
'translation'
>> with
>> sasxport.get is thus problematic.
>> If there is no easy tweak of the function, we will probably have to
>> remove
>> this script from our list of 'qualification' scripts.
>>
>> Although it would be nice
>
> Then my advice is to write your own wrapper function for sasxport.get
> that takes its output, looks for labelled variables, and adds a new
> class of your choosing depending on properties of the variable, making
> sure that you write methods needed for that class (if any). Then test
> your new function, not sasxport.get explicitly.
>
> Frank
>
>>
>>> Sebastien Bihorel wrote:
>>>> Frank,
>>>>
>>>> It is a non existing issue for me if the variables of class
"labelled"
>>>> (and only "labelled") can only be numerical variables
(integer or
>>>> numeric).
>>>>
>>>> Sebastien
>>> 'labelled' can apply to any type of vector. I'm not
clear on the
>>> problem this causes you. Please provide a command that is broken
by
>>> this behavior.
>>>
>>> Frank
>>>
>>>> Frank E Harrell Jr wrote:
>>>>> Sebastien Bihorel wrote:
>>>>>> Dear R-users,
>>>>>>
>>>>>> The sasxport.get function (from the Hmisc package)
automatically
>>>>>> defines the class of imported variables. I have noticed
that the
>>>>>> class of theoretically numeric variables is simply
"labelled",
>>>>>> although character variables might end up been defined
as "labelled"
>>>>>> "Date" or "labelled"
"factor".
>>>>>> Is there a way to tell sasxport.get to define numeric
variable as
>>>>>> "labelled" "integer" or
"labelled" "numeric"?
>>>>> Sebastien,
>>>>>
>>>>> If that would fix a problem you're having we could look
into it.
>>>>> Otherwise I'd tend to leave well enough alone.
>>>>>
>>>>> Frank
>>>>>
>>>>>> Thank you
>>>>>>
>>>>>> Sebastien
>>>>>>
>>>>>> ______________________________________________
>>>>>> 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.
>>>>>>
>>>>>
>>>
>>> --
>>> Frank E Harrell Jr Professor and Chair School of
Medicine
>>> Department of Biostatistics Vanderbilt
>>> University
>>>
>>
>>
>
>