REQUIREMENTS

  - R => 2.4.0

  - LyX => 1.4.4 (for LyX 1.4.3 use files from lyx-1.4.3 directory)

  - Unix shell for MS Windows users*

INSTALL STEPS

  1. Find the so-called LyX user directory or LyX library directory via the
     Help -> About LyX menu within LyX.

  2. Save the 'preferences' file in the LyX user directory or LyX library
     directory; append content if the 'preferences' file already exists.

  3. Save the 'literate-*.*' files to the 'layouts' sub-directory of the
     LyX user directory or LyX library directory.

  4. Make sure that Sweave.sty is in one of the texmf trees and that path
     database is updated.

  5. Start LyX and update configuration via the Tools -> Reconfigure menu
     within LyX.

  6. Make sure that the directory with R binaries is specified in the path
     variable so that LyX can use R. MS Windows users should go to: Start
     -> Control Panel -> System -> Advanced -> Environment Variables, and
     then add the bin directory of R installation to the PATH system
     variable, say c:\Progra~1\R\R-X.Y.Z\bin

  7. Restart LyX.

  8. Start using Sweave with LyX.

  For further details about step 4. see the paper "Using Sweave with LyX:
  How to lower the LaTeX/Sweave learning curve" available at:

  http://www.r-project.org/doc/Rnews/Rnews_2008-1.pdf

UNIX SHELL FOR MS WINDOWS*

  Unix shell is needed since R CMD Sweave and R CMD Stangle (used for
  weaving and tangling the document) use Unix shell scripts Sweave.sh and
  Stangle.sh. More info about Unix shell is available at:

  http://en.wikipedia.org/wiki/Unix_shell

  MS Windows users can install Unix shell in various ways (some
  possibilities which include Unix shell as well as plenty of other very
  usefull tools are provided below). In all cases Unix shell command must
  be installed to a place (directory) defined in PATH system variable!

  A. Rtools http://www.murdoch-sutherland.com/Rtools

  B. Cygwin http://www.cygwin.com

  C. MSYS http://www.mingw.org/msys.shtml

  Users of Windows batchfiles for R from http://batchfiles.googlecode.com
  can solve the need for Unix shell in two different ways:

    1. Copy Rcmd.bat and/or R.bat to any place defined in PATH system
       variable and install the latest set of Rtools.

    2. Copy Sweave.bat and Stangle.bat to any place defined in PATH system
       variable and use the following converter definitions in LyXs'
       preferences file:

       \converter "literate" "r"        "Stangle $$i" ""
       \converter "literate" "latex"    "Sweave $$i --tex"  ""
       \converter "literate" "pdflatex" "Sweave $$i --tex"  ""