From: Eric Schulte <schulte.eric@gmail.com>
To: emacs-orgmode@gnu.org
Subject: Re: [babel] how to pass data to gnuplot from another block
Date: Fri, 22 Nov 2013 08:00:59 -0700 [thread overview]
Message-ID: <87iovkihe6.fsf@gmail.com> (raw)
In-Reply-To: 87d2lsbvy7.fsf@ucl.ac.uk
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Hi Eric,
The attached works fine for me (using sh since I don't have octave).
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#+name: uptime
#+begin_src sh
paste <(echo -e "1\n5\n15") <(uptime|sed 's/^.*average: //;s/,//g'|tr ' ' '\n')
#+end_src
#+RESULTS: uptime
| 1 | 0.02 |
| 5 | 0.06 |
| 15 | 0.05 |
#+begin_src gnuplot :var data=uptime :results silent
set xrange [0:]
set yrange [0:]
set title "uptime"
set xlabel "minutes ago"
set ylabel "load"
plot data w lines
#+end_src
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Ensure that the data you're passing into gnuplot is a table and not a
string. Gnuplot blocks handle tables by writing them to a file, and
then replacing the variable with the file name. As I recall gnuplot
blocks assume string data already is a file name, so the variable is
replaced directly.
Best,
Eric S Fraga <e.fraga@ucl.ac.uk> writes:
> Hello,
>
> everything I have seen on the list and on Worg seems to indicate that it
> should be possible to pass data from a babel src block to a gnuplot src
> block. See, for instance, the excellent article on data collection and
> analysis at
>
> http://orgmode.org/worg/org-contrib/babel/examples/data-collection-analysis.html
>
> I don't have R so I have not tried the examples on this page. However,
> I have tried the following using octave and gnuplot:
>
> #+begin_src org
> ,#+TITLE: examplebug.org
> ,#+AUTHOR: Eric S Fraga
> ,* bubble and dew points
> ,#+name: bubble-point-temperatures
> ,#+begin_src octave :results raw output
> A = [ 6.86880 6.84941]';
> B = [1154.646 1206.001]';
> C = [ 226.046 223.148]';
> pv = @(T) 10.^(A-B./(T+C));
> x = 0;
> res = [];
> while x<(1+1e-3)
> f = @(T) 760 - [x (1-x)]*pv(T);
> T = fsolve(f, 70);
> printf("| %5.2f | %7.2f | \n", x, T);
> res = [res; [x T] ];
> x = x + 0.05;
> endwhile
> ,#+end_src
>
> ,#+begin_src gnuplot :var data=bubble-point-temperatures :file "bubble.pdf"
> set terminal pdfcairo mono enhanced font ",12" size 10cm,6cm
> plot data
> ,#+end_src
>
> ,#+results:
> [[file:bubble.pdf]]
> #+end_src
>
> Trying to execute the gnuplot block leads to an error in gnuplot because
> the output of the octave data block is being put directly into the data
> variable instead of into a file whose name is passed to the data
> variable. The latter happens if the source of the data is a table
> instead of a src block.
>
> I have tried various combinations of output directives for the first src
> block but to no avail.
>
> I have tried this with "emacs -Q", by the way, and my org is up to date
> as of a few minutes ago!
>
> What am I doing wrong please?
>
> Thanks,
> eric
--
Eric Schulte
https://cs.unm.edu/~eschulte
PGP: 0x614CA05D
next prev parent reply other threads:[~2013-11-22 15:31 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-22 9:57 [babel] how to pass data to gnuplot from another block Eric S Fraga
2013-11-22 15:00 ` Eric Schulte [this message]
2013-11-22 17:27 ` Nick Dokos
2013-11-23 16:15 ` Eric Schulte
2013-12-13 15:23 ` Greg Troxel
2013-12-13 15:30 ` Eric Schulte
2013-12-13 15:48 ` Greg Troxel
2013-12-13 16:20 ` Eric Schulte
2013-12-13 17:13 ` Eric Schulte
2013-12-13 19:32 ` Nick Dokos
2013-12-13 22:40 ` Achim Gratz
2013-12-13 23:18 ` Eric Schulte
2013-12-14 10:21 ` Achim Gratz
2013-12-13 18:38 ` Greg Troxel
2013-12-13 19:08 ` Sebastien Vauban
2013-12-13 16:32 ` Achim Gratz
2013-12-05 7:35 ` Eric S Fraga
2013-12-05 18:29 ` Eric Schulte
2013-12-05 19:59 ` Eric S Fraga
2013-12-06 2:06 ` Eric Schulte
2013-12-06 11:59 ` Eric S Fraga
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