On 19/12/2011 09:48, Hans-Jörg Bibiko wrote:
Hi,

it seems there's a possible bug in edit(x) if x is a matrix filled with NA only.

It's as documented. Hint: look at mode(a) or str(a), and check what values are accepted for a logical matrix.

To reproduce please do the following:

a<- matrix()
edit(a)

change e.g. the cell value to 1 and close the GUI-based editor. edit(a) returns NA. This 
also happens for any dimension of the matrix as long as all cell values are NA. If at 
least one of the cell values is not NA it works correctly. The same behaviour I also get 
via "fix(x)".

I tried this by using R via the Terminal (editing via X11 and Tcl/Tk) and the 
Mac R-GUI app.

Here's my sessionInfo():

R version 2.14.0 (2011-10-31)
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base


Any ideas? Or is this an undocumented behaviour?

Best,
--Hans

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Brian D. Ripley,                  rip...@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
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