R help - May 2010 - getSubClasses()?

Hi,
 
Is there a built in function that returns a character vector of all subclasses
of a given superclass?
showClass(Class = "SomeClass") contains the info that I want, but I
don't know how to access it.
getSubClasses <- function(superClass) return(setdiff(getClasses(.GlobalEnv),
superClass)) wíll only work if the global enviroment isn;t filled with other
class definitions.

I've seen functions that somewhat resemble it, but are not quite the same.
Thanks in advance!

Cheers!!
Albert-Jan

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
All right, but apart from the sanitation, the medicine, education, wine, public
order, irrigation, roads, a fresh water system, and public health, what have the
Romans ever done for us?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


      
	[[alternative HTML version deleted]]

On 05/20/2010 07:47 AM, Albert-Jan Roskam wrote:
> Hi,
> 
> Is there a built in function that returns a character vector of all
> subclasses of a given superclass? showClass(Class = "SomeClass")
> contains the info that I want, but I don't know how to access it. 
Hi Albert-Jan --

Maybe
> slotNames(class(getClass("vector")))
 [1] "slots"      "contains"   "virtual"   
"prototype"  "validity"
 [6] "access"     "className"  "package"   
"subclasses" "versionKey"
[11] "sealed"
> names(getClass("vector")@subclasses)
 [1] "logical"            "numeric"           
"character"
 [4] "complex"            "integer"           
"raw"
 [7] "expression"         "list"              
"structure"
[10] "array"              "matrix"            
"signature"
[13] "ObjectsWithPackage" "mts"               
"ordered"
[16] "namedList"          "listOfMethods"

Martin
> getSubClasses <- function(superClass)
> return(setdiff(getClasses(.GlobalEnv), superClass)) w?ll only work if
> the global enviroment isn;t filled with other class definitions.
> 
> I've seen functions that somewhat resemble it, but are not quite the
> same. Thanks in advance!
> 
> Cheers!! Albert-Jan
> 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> 
All right, but apart from the sanitation, the medicine, education, wine,
public order, irrigation, roads, a fresh water system, and public
health, what have the Romans ever done for us?
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> 
> 
> 
> [[alternative HTML version deleted]]
> 
> 
> 
> 
> ______________________________________________ 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.

-- 
Martin Morgan
Computational Biology / Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N.
PO Box 19024 Seattle, WA 98109

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Phone: (206) 667-2793