John,
I have fixed the empty dataset issue and few other borderline cases,
so please try the updated R.app GUI (either from SVN or wait until
it's available again).
However, there are apparently still some issues in the UI that I was
not able track down since they occur only sparsely and randomly all
over the place in internals of the Cocoa event handling when deleting
multiple columns at once. They don't crash in our R.app code, so it's
extremely difficult to trace. All I can say is don't delete multiple
columns at once after busy adding/deleting ;). We really need a
rewrite here ...
Thanks,
Simon
On Jan 9, 2009, at 2:07 PM, John Fox wrote:
Dear list members,
I thought that I recalled a recent posting reporting a problem with
the R
data editor, but I haven't been able to locate the message in the list
archive.
In any event, I can reliably cause the R.app data editor either to
hang or
to produce errors in a couple of ways, the first of which is easier to
describe (the X11 data editor seems more robust, if limited in its
capabilities):
(1) Edit an empty data frame (which works in the Windows and X11 data
editors): edit(as.data.frame(NULL)).
(2) Edit any data frame "vigorously," adding a deleting rows and
columns
repeatedly. E.g., library(car); edit(Prestige).
I'm using R 2.8.1 installed from the binary on CRAN under OS X
10.5.5 on a
MacBook.
I wonder whether anyone else has observed these problems or has an
idea
about how to fix them.
(I'm copying Brian Ripley since we exchanged emails about this issue
earlier
today.)
Regards,
John
------------------------------
John Fox, Professor
Department of Sociology
McMaster University
Hamilton, Ontario, Canada
web: socserv.mcmaster.ca/jfox
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