From J.C.Rougier@durham.ac.uk  Fri Oct  8 09:43:53 1999
From: J.C.Rougier@durham.ac.uk (J.C.Rougier@durham.ac.uk)
Date: Fri, 8 Oct 1999 10:43:53 +0200 (MET DST)
Subject: dimnames and subscripting (PR#293)
Message-ID: <199910080843.KAA09091@pubhealth.ku.dk>

I am not sure that this is a bug, but it was unexpected -- of course my
expectations are fallible, eg column ordering in model.matrix()!  When an
array is subscripted the names of the dimnames list are lost (v 64.1). 

fred <- array(1:12, 2:4, list(A = letters[1:2], B = letters[3:5], C =
    letters[6:9]))

dimnames(fred)
dimnames(fred[1, , ])
dimnames(fred[1, , , drop=FALSE])

In the first case I expected names B and C to be preserved; in the second
case, not quite so clear-cut, I also expected B and C to be preserved.

Cheers, Jonathan.

Jonathan Rougier                       Science Laboratories
Department of Mathematical Sciences    South Road
University of Durham                   Durham DH1 3LE

"[B]egin upon the precept ... that the things we see are to be 
 weighed in the scale with what we know"  (Meredith, 1879, The Egoist)


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dimnames and subscripting (PR#293)
J.C.Rougier@durham.ac.uk