Groups > comp.graphics.apps.gnuplot > #2945

Re: Passing a GNUplot variable to system(/usr/bin/awk)

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From	Hans-Bernhard Bröker <HBBroeker@t-online.de>
Newsgroups	comp.graphics.apps.gnuplot
Subject	Re: Passing a GNUplot variable to system(/usr/bin/awk)
Date	Sat, 20 Jun 2015 01:43:13 +0200
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Am 18.06.2015 um 03:00 schrieb Dan'l B:
> This line in GNUplot works fine:
>
> system("/usr/bin/awk '/-1.98/{print $2 $1}' /path/to/myfile.txt")
>
> But how would I pass a variable from GNUplot into that in place of the -1.98 value?

About the most straightforward way would probably be to use gnuplot's 
string manipulation functions to construct your awk command line, e.g.

	awkcommand = sprintf("/usr/bin/awk '/%f/{print $2 $1}' 
/path/to/myfile.txt", STATS_max_y)
	system(awkcommand)

Thread

Passing a GNUplot variable to system(/usr/bin/awk) "Dan'l B" <dan.hinckley@gmail.com> - 2015-06-17 18:00 -0700
  Re: Passing a GNUplot variable to system(/usr/bin/awk) Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2015-06-20 01:43 +0200
    Re: Passing a GNUplot variable to system(/usr/bin/awk) "Dan'l B" <dan.hinckley@gmail.com> - 2015-06-20 07:58 -0700

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