On Mon, 24 Jan 2005, McGehee, Robert wrote:
[Instructions to the R developers deleted.]
Secondly, the ?options help (thanks for everyone who reminded me about this), says that expressions can have values between 25...100000.
However, if the original example is set past 4995 on my computers, I receive a stack overflow.
More accurately, you caused a protection stack overflow.
eval(parse(text = paste(rep(1, 4996), collapse = "+")))Error: protect(): stack overflow
I'm pointing this out not because I will ever approach anywhere near this level of nesting, but perhaps that options(expression=5000+) might not be meaningful anyway, (unless there are processor/compilation-specific ways of getting rid of this stack overflow). If so, one might considering lowering the range of valid expressions values in the help file.
It's the protect stack you are overflowing, and there are ways to increase that (look at the command-line flags) and other nested computations that do not protect repeatedly.
-- Brian D. Ripley, [EMAIL PROTECTED] 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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