Re: org-babel and gnuplot

[Nick Parker <nickp@developernotes.com>]

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Hi John,

I would actually like to plot different lines per distance, each
that correlate to a date and elapsed-time (x and y axis respectively).  I
get an error with the :file notation, though I read that in a sample babel
gnuplot example for generating graphs of commit history on the org-mode git
repository.  I tried to reference the variable data without the quotes and $
sign without any success.  I will continue to fiddle with it, I am new to
gnuplot.

Nick Parker
www.developernotes.com


On Tue, Sep 7, 2010 at 8:54 PM, John Hendy <jw.hendy@gmail.com> wrote:

> Hi Nick,
>
> Maybe two things off hand (booted into OS X right now where I can't try
> your code..)
>
> 1) try using straight gnuplot without going through org to verify your
> commands. This helps make sure that the syntax isn't producing errors.
> Another way to check this out sometimes is to C-c C-c on the code block, run
> the code, and then C-x b to the *gnuplot buffer to view any error messages.
> Those might prove helpful.
>
> 2) try changing your plot line to: plot data using 1:2:3 notitle
>
> I think I ran into an issue using "$data" even though it's the gnuplot
> syntax. I found org examples on the mailing list where just "data" was used
> instead (no quotes) and that worked.
>
>
> John
>
> P.S. Are you trying to make a 3D graph? plot using 1:2:3 will yield a 3D
> graph and you didn't mention a z-axis label so I'm wondering if that's
> really what you want? You may want to split this into two graphs to have
> date vs. time and date vs. distance? Or date vs. distance/time (speed)?
>
> P.P.S Or perhaps judging by the boxwidth option you want the width of the
> bars in the graph to represent the miles run? In that case you want 'plot
> data using 1:2:3 with boxes notitle' I think.
>
>
>
> On Tue, Sep 7, 2010 at 8:29 PM, Nick Parker <nickp@developernotes.com>wrote:
>
>> Hello,
>>
>> I am attempting to generate a simple chart from gnuplot using the source
>> of an org-table.  When I execute the gnuplot src block I get the message
>> "Source block produced no output".  Does anyone have any suggestions as to
>> what might be the cause?  I have included a sample of what I am trying to
>> run:
>>
>> #+tblname: sessions
>> | Date       |  Time | Distance |
>> |------------+-------+----------|
>> | 09/02/2010 | 15:13 |      2.5 |
>> | 09/01/2010 | 14:00 |      2.4 |
>>
>> #+begin_src gnuplot :var data=sessions
>>   :file org-running.png :exports both
>>   set title "Running Stats"
>>   set auto x
>>   set style data histogram
>>    set style fill solid border -1
>>   set boxwidth .9
>>   set xlabel "Date"
>>   set ylabel "Time"
>>   plot "$data" using 1:2:3 notitle
>> #+end_src
>>
>> Nick Parker
>> www.developernotes.com
>>
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>>
>>
>

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