I've recently updated from an early February version of 1.7.0 to
Version 1.7.0 Under development (unstable) (2003-03-25)
and am now having problems with errors giving the message:
' getExtends(ClassDef) : @ must be used on an object with a formal class'
which seems to be caused by 'setIs("character","character or NULL")'
which attempts to define 'character' as an extension of the virtual
class 'character or NULL' defined in 'setClass("character or NULL")'.
If I try this:
> library(methods)
> setClass("CN")
[1] "CN"
> setIs("NULL","CN")
> setIs("numeric","CN")
> setIs("character","CN")
Error in getExtends(ClassDef) : @ must be used on an object with a formal class
The fact that 'setIs("numeric","CN")' and 'setIs("NULL","CN")' work just fine
leads me to believe that this is a bug in the new R-devel version.
url: www.econ.uiuc.edu Roger Koenker Dept. of Economics UCL,
email [EMAIL PROTECTED] Department of Economics Drayton House,
vox: 217-333-4558 University of Illinois 30 Gorden St,
fax: 217-244-6678 Champaign, IL 61820 London,WC1H 0AX, UK
______________________________________________
[EMAIL PROTECTED] mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-devel
