dimnames and subscripting (PR#293)

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Subject: dimnames and subscripting (PR#293)
J.C.Rougier@durham.ac.uk
Date: Fri 08 Oct 1999 - 18:43:53 EST


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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