[Rd] several bugs (PR#918) lists and matrices

Peter Dalgaard BSA p.dalgaard@biostat.ku.dk
24 Apr 2001 00:12:21 +0200

Thomas Lumley <tlumley@u.washington.edu> writes:

> This is a more difficult question.  You can't put a list into a matrix.
> Matrices handle homogenous data; they are vectors with a dimension
> attribute.  Lists with an arbitrary dimension attribute are, as Rob
> pointed out, an unimplemented bug.

Ummm. I'd have to say that it is an implemented bug if a bug at all.
tapply() does this all the time (although most often by accident), and
is even documented to do so. If one can have a list with a dim(), not
being able to index such a beast does look like a bug to me...

   O__  ---- Peter Dalgaard             Blegdamsvej 3  
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