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[O] using gnuplot's "splot" and "every" commands on org-mode table data
From: |
Paul Stansell |
Subject: |
[O] using gnuplot's "splot" and "every" commands on org-mode table data |
Date: |
Wed, 1 May 2013 15:39:56 +0100 |
Hello everyone,
I'd be grateful if someone would offer me advice on using gnuplot's
"splot" and "every" commands when plotting data from a table within
org-mode.
As far as I can tell, these gnuplot commands do not work properly
because org-mode exports empty fields in tables as "" and gnuplot's
"every" and splot commands expect the data file to be formatted as a
datablock with blank lines marking the boundaries between datablocks.
(For the definition of a datablock, type "help glossary" at the
gnuplot prompt.)
I'm using org-mode version 8.0.2 and emacs version 24.2.1 on a
Fedora-18 system
To illustrate my point, consider a blocked datafile called "block.dat"
containing the following:
1 1 2
1 2 5
1 3 10
2 1 5
2 2 8
2 3 13
3 1 10
3 2 13
3 3 18
For this file the gnuplot command
#+begin_src gnuplot :var d="block.dat" :results silent
plot "$d" u 2:3 ev :::0::0, "" u 2:3 ev :::1::1, "" u 2:3 ev :::2::2
#+end_src
shows three separate lines of different colours as gnuplot
recognises the datafile as blocked data.
Also, the following command produces a surface plot
#+begin_src gnuplot :var d="block.dat" :results silent
splot "$d" u 1:2:3
#+end_src
However, if I put the same data in the table below
#+tblname: data
| 1 | 1 | 2 |
| 1 | 2 | 5 |
| 1 | 3 | 10 |
| | | |
| 2 | 1 | 5 |
| 2 | 2 | 8 |
| 2 | 3 | 13 |
| | | |
| 3 | 1 | 10 |
| 3 | 2 | 13 |
| 3 | 3 | 18 |
and use the following plot command
#+begin_src gnuplot :var d=data :results silent
plot "$d" u 2:3 ev :::0::0, "" u 2:3 ev :::1::1, "" u 2:3 ev :::2::2
#+end_src
the result is a plot of a single line of the same colour as gnuplot
joins all of the points in the data file. This seems to be because
org-mode exports the table as
"x" "y" "z"
1 1 2
1 2 5
1 3 10
"" "" ""
2 1 5
2 2 8
2 3 13
"" "" ""
3 1 10
3 2 13
3 3 18
and gnuplot does not recognise this as a blocked data file because it
contains no blank lines.
The same problem occurs for
#+begin_src gnuplot :var d=data :results silent
splot "$d" u 1:2:3
#+end_src
which does not produce a gridded surface plot.
Thanks for your help,
Paul
- [O] using gnuplot's "splot" and "every" commands on org-mode table data,
Paul Stansell <=
- Re: [O] using gnuplot's "splot" and "every" commands on org-mode table data, Eric Schulte, 2013/05/06
- Re: [O] using gnuplot's "splot" and "every" commands on org-mode table data, Achim Gratz, 2013/05/06
- Re: [O] using gnuplot's "splot" and "every" commands on org-mode table data, Eric S Fraga, 2013/05/09
- Re: [O] using gnuplot's "splot" and "every" commands on org-mode table data, Achim Gratz, 2013/05/09
- Re: [O] using gnuplot's "splot" and "every" commands on org-mode table data, Eric S Fraga, 2013/05/09
- Re: [O] using gnuplot's "splot" and "every" commands on org-mode table data, Achim Gratz, 2013/05/11
- Re: [O] using gnuplot's "splot" and "every" commands on org-mode table data, Rick Frankel, 2013/05/11
- Re: [O] using gnuplot's "splot" and "every" commands on org-mode table data, Eric S Fraga, 2013/05/21
Re: [O] using gnuplot's "splot" and "every" commands on org-mode table data, Paul Stansell, 2013/05/07