On 3 Jan 2006, [EMAIL PROTECTED] wrote: > It's legal to have virtual classes as slots, but yes, the slot is > NULL in the prototype for the new class, unless the user specifies a > value. In your case, providing a non-null prototype for the > data.frame slot might be the desired solution.
Yes, that's a workaround. > There is no S4 "initialization" for S3 classes; in fact, it's > generally an error to use new() on them (or on other virtual > classes). The "basic vector classes" (see man page for new) can be created with new(). From my perspective it would be more consistent if data.frame and factor behaved similarly. I admit that I don't understand why data.frame and factor are virtual classes and don't know what would be involved to have new() work for data.frame and factor. + seth ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
