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Re: [Texmacs-dev] keymappings

From: Sam Liddicott
Subject: Re: [Texmacs-dev] keymappings
Date: Tue, 09 Aug 2011 16:52:57 +0100
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On 09/08/11 16:28, Michael Lachmann wrote:

On 9 Aug 2011, at 4:59PM, Sam Liddicott wrote:

An alternative is to have a separate session for each document. This means that 
you can't easily share values between documents. The main times I use this is 
when I clean up a document, or sum it up - then I open a second, cleaned 

Sharing of sessions between documents scares me. I think because I don't want 
to clean up a document. For this reason I generally avoid using shell sessions 
- but a shell is probably much more stateful than an R session.
I'm not totally sure what you mean, but I think R sessions are as stateful as 
shell sessions, if not more. (You have variables/libraries loaded etc, you have 
you current directory, and sessions can be saved/loaded across restarts. They 
are saved in the current directory....)
And you are right - it can be a big mess - within a document, while working, 
the result of a calculation can easily appear before the calculation, because 
you went up, or the calculation could have been erased. A lot of my time is 
wasted hunting up and down a document for where something was calculated.... 
but it also has its benefits, I guess like GOTOs in programming have their 
benefits.... hmm...

dear me.. it sounds like one needs to be very disciplined. I can see that the R1 R2 macros you mention are useful while messing about but the risks involved and the understanding required (which you clearly have) to not get in a mess make me think that they should be personal preferences and not global, and awkwardness of the steps to install these into the personal preferences file is really a blessing.

But I work with TeXmacs more as a sophisticated terminal for R, not really as a 
way to generate documents with R in them.

Yes... what gets me is that sessions do not behave like the texmacs document. The document is like a program that is executed starting at the top, and which has a side effect of typesetting a document. Changes to the texmacs environment made near the top are visible near the middle and at the end, and so on, but never the other way around.

But it seems that multiple R insertions using the same session can get into a mess, but that texmacs does nothing to try and preserve the same pattern of work - so I find sessions a good way to typeset a historical log of something that was done, but with uncertainty that it is repeatable.



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