[Rd] list2env() is broken
Prof Brian Ripley
ripley at stats.ox.ac.uk
Fri Oct 29 09:17:26 CEST 2010
I have no idea what 'timeout' means, but that *should* take an
extraordinarily long time (it is at least quadratic in the input
length). This is the point of hashing -- you *need* hash=TRUE, and
you should probably also set 'size' in new.env.
There was an obvious missing PROTECT in this function.
I do wonder if you are yet familiar with the debugging tools described
in 'Writing R Extensions' -- please do use them before reporting.
On Thu, 28 Oct 2010, Hervé Pagès wrote:
> The following code produces different kinds of problems depending
> on which platform you run it:
> x <- as.list(1:200000)
> names(x) <- paste("A", 1:200000, sep="")
> e <- list2env(x)
> Timeout on Linux, crash on Mac and Windows, with R 2.12.0 and
> current R devel.
> The "multi-assign" mode (i.e. when the 'envir' arg is supplied)
> doesn't seem to have this problem.
> Hervé Pagès
> Program in Computational Biology
> Division of Public Health Sciences
> Fred Hutchinson Cancer Research Center
> 1100 Fairview Ave. N, M2-B876
> P.O. Box 19024
> Seattle, WA 98109-1024
> E-mail: hpages at fhcrc.org
> Phone: (206) 667-5791
> Fax: (206) 667-1319
> R-devel at r-project.org mailing list
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 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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