Thanks for your rsponse 

But if one never runs RTools, how does it do this.

In the instructions, it seems as if RTools does not get run; or am I missing
something.

Also when I downloaded RTools it seems as if this is a tools to re-compile
the source code, since a full download also inlcludes a compiler etc.
Furthermore, it also seems as if RTools implements Cygwin.

All in all very confusing........

Really appreciate you taking the trouble to try and help

Regards
Steve

-----Original Message-----
From: Liviu Andronic [mailto:landronim...@gmail.com] 
Sent: 12 June 2011 11:32 PM
To: Steve Sidney
Cc: myi...@gmail.com; lyx-users@lists.lyx.org
Subject: Re: lyx 2 and sweave

On Sun, Jun 12, 2011 at 4:02 PM, Steve Sidney <ste...@nla.org.za> wrote:
> How does RTools get invoked;  I see that it is a very large 
> installation
> (200Mb) with compiler etc but I can't see where it get used in either 
> Rob's or your description.
>
As far as I know, RTools simply (among other things) properly sets up R in
the Windows environment so that LaTeX and LyX can communicate with R. At
this step, you shouldn't be doing much more. Are you sure you have
reconfigured LyX?

Liviu

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