From help-request at octave dot org Thu Dec  2 14:43:39 2004
Subject: Re: synchronization of octave with gnuplot?
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Mike Miller <mbmiller at taxa dot epi dot umn dot edu>
Cc: Thorsten Meyer <thorsten dot meyier at gmx dot de>,         Help-Octave List <help@octave.org>
Date: Thu, 2 Dec 2004 15:43:36 -0500

On  2-Dec-2004, Mike Miller <mbmiller at taxa dot epi dot umn dot edu> wrote:

| On Thu, 2 Dec 2004, Thorsten Meyer wrote:
| 
| >> It is possible to put an 'if' statement in your script to have it 
| >> either "sleep(1)" or execute the awk code depending on the existence of 
| >> a file or the existence of an ending element in a file tail.
| > 
| > You are right. I could have octave wait for the existence of the file. 
| > But as soon as it exists, I would have to keep parsing it in a loop in 
| > order to see if it is complete.
| 
| But can't you then use my second suggestion and look at the file tail for 
| a string?  For example, maybe this command...
| 
| tail -1 file.eps
| 
| ...always returns this string...
| 
| %%EOF
| 
| ...when the gnuplot process has completed.  The details of how this would 
| be done depend on your shell.

If you just want to postprocess, then why not write your awk script as
a filter, then do something like

  gset output "| awk -f myscript.awk > foo.eps"

Does that work?  To get the output flushed to the pipe, you may have
to issue another "gset output" command or use closeplot.

jwe



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