On Aug 9, 2012, at 4:56 PM, Zhang, Peng wrote:
Dear all,
I had a R segmentation fault, and then invoked debug mode and ran step
by step.
When I reached "terms(Y~X1*X2*...*X16)", I would then have
"segmentation" fault. However, if I just ran this under regular "R
interactive" mode, it would be fine though taking long time.
My questions are:
1. Is there a known limit of terms for a formula?
I think so. I seem to remember it was something around 500 characters,
but was raised a couple of years ago.
This is a 2010 extract of a posting by the indomitable Prof Ripley:
"R-devel:
• The previously almost undocumented limit of 256 bytes on a symbol
name has been raised to 10,000 bytes (a sanity check). Long symbol
names can sometimes occur when deparsing expressions (for example, in
model.frame). "
Found with a MarkMail search with this strategy:
list:org.r-project.r-devel maximum length of formula
Subject:Re: [Rd] model.frame problem
From:Prof Brian Ripley (rip...@stats.ox.ac.uk)
Date:Nov 3, 2010 1:37:50 pm
List:org.r-project.r-devel
2. Why does the same function behave differently under debug and
regular
mode?
I cannot help you there.
--
David Winsemius, MD
Alameda, CA, USA
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