[R] weird error: Coercing LHS to a list

[David Winsemius]

On Jun 20, 2010, at 6:12 PM, David Winsemius wrote:

>
> On Jun 20, 2010, at 5:40 PM, Nick Matzke wrote:
>
>> Wow, did I stump everyone with this?  Mostly I'd just like to build  
>> a class without getting the error below.
>
> Hardly.
>
> a) LHS= left hand side
> b) It is not an error message in the first place, and for another  
> thing, why are you creating instances of a class with the same name  
> as the class?

( You probably need to look at the documentation for new(). )


>
>>
>> Cheers!
>> Nick
>>
>> Nick Matzke wrote:
>>> Hi all!  I'm trying to build a simple class, but I'm getting a  
>>> weird error.
>>> E.g. if I do:
>>> ==========
>>> gregion = setClass("gregion", contains = "data.frame",  
>>> representation(name = "character", poly.x = "numeric", poly.y =  
>>> "numeric" ))
>>> gregion$name = "North America"
>>> ==========
>>> Then I get this message:
>>> Warning message:
>>> In gregion$name = "North America" : Coercing LHS to a list
>>> ...although it appears to work, I'd rather not have disturbing  
>>> mysterious error messages (what's LHS?)...
>>> Cheers!
>>> Nick
>>
>> -- 
>> ====================================================
>> Nicholas J. Matzke
>> Ph.D. Candidate, Graduate Student Researcher
>> Huelsenbeck Lab
>> Center for Theoretical Evolutionary Genomics
>> 4151 VLSB (Valley Life Sciences Building)
>> Department of Integrative Biology
>> University of California, Berkeley
>>
>> Graduate Student Instructor, IB200A
>> Principles of Phylogenetics: Systematics
>> http://ib.berkeley.edu/courses/ib200a/index.shtml
>>
>> Lab websites:
>> http://ib.berkeley.edu/people/lab_detail.php?lab=54
>> http://fisher.berkeley.edu/cteg/hlab.html
>> Dept. personal page: http://ib.berkeley.edu/people/students/person_detail.php?person=370
>> Lab personal page: http://fisher.berkeley.edu/cteg/members/ 
>> matzke.html
>> Lab phone: 510-643-6299
>> Dept. fax: 510-643-6264
>> Cell phone: 510-301-0179
>> Email: matzke at berkeley.edu
>>
>> Mailing address:
>> Department of Integrative Biology
>> 3060 VLSB #3140
>> Berkeley, CA 94720-3140
>>
>> -----------------------------------------------------
>> "[W]hen people thought the earth was flat, they were wrong. When  
>> people thought the earth was spherical, they were wrong. But if you  
>> think that thinking the earth is spherical is just as wrong as  
>> thinking the earth is flat, then your view is wronger than both of  
>> them put together."
>>
>> Isaac Asimov (1989). "The Relativity of Wrong." The Skeptical  
>> Inquirer, 14(1), 35-44. Fall 1989.
>> http://chem.tufts.edu/AnswersInScience/RelativityofWrong.htm
>>
>> ______________________________________________
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>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
> David Winsemius, MD
> West Hartford, CT
>
> ______________________________________________
> 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.

David Winsemius, MD
West Hartford, CT