[Rd] R plot display problem under windows when using python rpy module.

[Bo Peng]

Dear list,

Rpy is a python module that provides python interface to R. The
following simple commands

>>> from rpy import *
>>> r.plot(0)

is supposed to create a window that displays the result of plot(0).

However, we observe that
1. Under *nix, rpy+R+python  work as expected
2. Under windows, python + pythonWin32 (a python GUI provided by the
pywin32 module), work as expected
3. Under windows, if we run the commands from command line or IDLE (a
simple python IDE), a window will be created, but the figure will not
be drawn. Then, if we run r.plot(2), the result of plot(0) will be
drawn. plot(2) will be displayed when the next drawing command is
executed.

Since R works well in most cases, I do not think this is a R problem.
However, can anyone tell me what *might* block the figures from being
displayed? In other word, what might PythonWin have provided to enable
correct rendering of the figures? If I have to trace to the sources,
what portion of the R code should I have a look at? (It is good that
python/R/rpy are all open source).

Many thanks in advance.
Bo