[R] beamer overlays with Sweave?

From: Ben Bolker <bbolker_at_gmail.com>
Date: Mon, 07 Mar 2011 22:20:49 -0500

  This may be asking too much, but I'm wondering if anyone has a solution (even a hack) for creating multiple (overlay) plots in an Sweave file and post-processing the overlays in beamer appropriately.

  For example, suppose I have a series of figure blocks in my .Rnw file:


  These three blocks create three figures that I want to have appear as a series of overlays in the final PDF file.

  Sweave outputs the following LaTeX code:


  and I need to turn it into


  I have few enough of these that I've been modifying them by hand (couldn't easily come up with the appropriate sed/awk incantation); it works, but it's annoying and error-prone. I could spend some more time hacking it, but I wondered if anyone else had already solved this ...

  (Brief googling of "beamer+Sweave+overlay" didn't find an obvious answer, but I might have missed something ...)

    Ben Bolker

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