You can always check the list archives (the ETHZ ones): it did make
it. See the thread starting at
https://stat.ethz.ch/pipermail/r-devel/2009-July/054184.html
I need to look more carefully, but this is not what ... is documented
to do and it would need to be an extra argument for this method.
Since terms.formula predates backticks, perhaps the change is better
made there?
On Fri, 31 Jul 2009, Sundar Dorai-Raj wrote:
On Thu, Jul 30, 2009 at 2:30 PM, Sundar Dorai-Raj<sdorai...@gmail.com> wrote:
On Thu, Jul 30, 2009 at 2:28 PM, Sundar Dorai-Raj<sdorai...@gmail.com> wrote:
I just noticed the following in update.formula and I'm wondering if
this behavior is the intention of the developers. Here's an example:
update(`a: b` ~ x, ~ . + y)
Note now that the response has no backticks and is interpreted as a:b
(i.e. ":" is now an operator). This is because in update.formula the
call to terms.formula uses simplify = TRUE. I'm working with data that
has a lot of colons in their names and for reporting purposes I don't
want to use make.names to avoid this situation. I do have a solution
which simply avoids using update.formula, but I wonder if the
developers would consider removing the "simplify" argument and allow
it to be passed through "...", which is currently ignored by
update.formula. Alternatively, add a simplify=TRUE to the
update.formula call, which can manually be set to FALSE by the user.
I would love to hear any comments or criticisms of my findings.
Thanks,
--sundar
Forgot my version info
version
_
platform x86_64-unknown-linux-gnu
arch x86_64
os linux-gnu
system x86_64, linux-gnu
status
major 2
minor 9.1
year 2009
month 06
day 26
svn rev 48839
language R
version.string R version 2.9.1 (2009-06-26)
This bounced on me so I don't know if it actually made it through.
Sorry if this is a repost.
--sundar
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Brian D. Ripley, rip...@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
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