dump() bug? - R-help | R Mailing Lists

Tue, Nov 26, 2002 11:59 PM #

Is this a bug?  Certainly it was not expected.  dump() seems to prefer a
global definition over a local one.  R 1.6.1 on Solaris 8 or NetBSD:

character(0)

"D" <-
function (expr, name)
.Internal(D(expr, name))

[1] "D"

"D" <-
function (expr, name)
.Internal(D(expr, name))

The same thing happens with dump(list=ls(), "D.q").

Ray Brownrigg
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Brian Ripley

Wed, Nov 27, 2002 12:48 AM #

It is not a bug, but it may not be intended.  It is a consequence of
namespaces.  Since dump is in base, it searches base before the user's
workspace.  That is something that seems only to be documented in NEWS.

I don't follow your use of `local' and `global'.  Your `local' copy is in
.GlobalEnv, the global environment aka workspace!

On Wed, 27 Nov 2002, Ray Brownrigg wrote:

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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Peter Dalgaard

Wed, Nov 27, 2002 2:43 AM #

<ripley at stats.ox.ac.uk> writes:

Sounds like the natural way to fix this would be to add an envir=
argument, defaulting to parent.frame(), and pass it down to the
internal routine?

O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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