R help - Jan 2006 - Sweave: skip if figure exists

Dear RWeavers,

to speed up report generation with Sweave, I am looking for an option
"skipifexists" for figures. A named figure chunk should not be
executed if
the file to be produced already exists.

I know that this could be done with hooks, but I want to avoid to re-invent
this wheel.

Dieter

>>>>> On Mon, 23 Jan 2006 16:41:09 +0100,
>>>>> Dieter Menne (DM) wrote:
  > Dear RWeavers,
  > to speed up report generation with Sweave, I am looking for an option
  > "skipifexists" for figures. A named figure chunk should not be
executed if
  > the file to be produced already exists.

  > I know that this could be done with hooks, but I want to avoid to
re-invent
  > this wheel.

I have plans to implement something like this for a very long time
now, but no code yet. Contributions are of course more than welcome.

Best,

-- 
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                        Friedrich Leisch 
Institut f??r Statistik                     Tel: (+43 1) 58801 10715
Technische Universit??t Wien                Fax: (+43 1) 58801 10798
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A-1040 Wien, Austria             http://www.ci.tuwien.ac.at/~leisch