From: Eric Schulte <schulte.eric@gmail.com>
To: Nick Dokos <ndokos@gmail.com>
Cc: emacs-orgmode@gnu.org
Subject: Re: [babel] how to pass data to gnuplot from another block
Date: Sat, 23 Nov 2013 09:15:02 -0700 [thread overview]
Message-ID: <874n73gk70.fsf@gmail.com> (raw)
In-Reply-To: 8738mol52h.fsf@alphaville.bos.redhat.com
Nick Dokos <ndokos@gmail.com> writes:
> Eric Schulte <schulte.eric@gmail.com> writes:
>
>
>> The attached works fine for me (using sh since I don't have octave).
>>
>> #+name: uptime
>> #+begin_src sh
>> paste <(echo -e "1\n5\n15") <(uptime|sed 's/^.*average: //;s/,//g'|tr ' ' '\n')
>> #+end_src
>>
>
> Just an fyi: I had to set org-babel-sh-command to "bash" for this to
> work. Why is "sh" the default value of this variable?
>
I think sh is more portable, but I guess almost any system should have
bash as well, I've just changed this default to bash.
Cheers,
>
>> #+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
>>
>> 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.
>>
>
> Ah, that explains everything! I also didn't have octave on this machine
> so I wrote a python block. Initially, I had
>
> --8<---------------cut here---------------start------------->8---
> #+name: foo
> #+begin_src python
> x = ((1, 1), (2, 4), (3, 9))
> return "\n".join(["|%d | %d |" % (y[0], y[1]) for y in x])
> #+end_src
>
>
> #+RESULTS: foo
> | 1 | 1 |
> | 2 | 4 |
> | 3 | 9 |
> --8<---------------cut here---------------end--------------->8---
>
> which looks like a table, but isn't: the gnuplot block was blowing
> up just like Eric F's. I replaced it with
>
> --8<---------------cut here---------------start------------->8---
> #+name: foo
> #+begin_src python
> x = ((1, 1), (2, 4), (3, 9))
> return x
> #+end_src
>
>
> #+RESULTS: foo
> | 1 | 1 |
> | 2 | 4 |
> | 3 | 9 |
> --8<---------------cut here---------------end--------------->8---
>
> and everything is working. The only problem is that the results
> *look* the same, so it's hard to see what the type is.
>
> Nick
>
>
>
>
--
Eric Schulte
https://cs.unm.edu/~eschulte
PGP: 0x614CA05D
next prev parent reply other threads:[~2013-11-23 16:25 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
2013-11-22 17:27 ` Nick Dokos
2013-11-23 16:15 ` Eric Schulte [this message]
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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