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Re: [Orgmode] Ignore some lines when using org-plot/gnuplot
From: |
Eric Schulte |
Subject: |
Re: [Orgmode] Ignore some lines when using org-plot/gnuplot |
Date: |
Sat, 14 Nov 2009 20:34:55 -0700 |
User-agent: |
Gnus/5.110011 (No Gnus v0.11) Emacs/23.1.50 (darwin) |
Darlan Cavalcante Moreira <address@hidden> writes:
> Hi everybody,
>
> Is there a way to ignore some lines when using org-plot/gnuplot to plot a
> table
> in Org? I have a table with some expenses, but the last two lines are the
> total
> calculated from the previous lines. I'd like to plot only the expenses and
> ignore the last two lines.
>
> In the docs there is the option "deps" to specify which columns should be
> plotted but I can't find an equivalent for lines (there is a line option but I
> understand that it is used to send some extra command to gnuplot).
>
Hi Darlan,
Sorry about the extremely delayed reply. I don't believe that what
you've described is possible in the current implementation of org-plot.
It is possible however using org-babel which supports gnuplot.
Org-babel now allows indexing into the values of variable assignments.
So for example a simple gnuplot example could graph the contents of a
table by assigning that table to a variable
#+tblname: squares
| 1 | 1 |
| 2 | 4 |
| 3 | 9 |
| 4 | 16 |
| 5 | 25 |
| 6 | 36 |
#+begin_src gnuplot :var data=squares :results silent
plot data using 1:2 with lines
#+end_src
with this new change it is possible to assign only part of the table to
a variable as you've described above. For example
#+tblname: squares-with-sum
| 1 | 1 |
| 2 | 4 |
| 3 | 9 |
| 4 | 16 |
| 5 | 25 |
| 6 | 36 |
|----+----|
| 21 | 91 |
#+begin_src gnuplot :var data=squares-with-sum[0:-3] :results silent
plot data using 1:2 with lines
#+end_src
For more information on indexing see the documentation of the
`org-babel-ref-index-list' function.
Thanks for motivating this new feature -- Eric
>
>
> - Darlan
>
>
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