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<title>Gri: Filename arguments when running gri</title>
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Chapters:
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<a href="Introduction.html">1: Introduction</a><br>
<a href="SimpleExample.html">2: Simple example</a><br>
<a href="InvokingGri.html">3: Invocation</a><br>
<a href="GettingMoreControl.html">4: Finer Control</a><br>
<a href="X-Y.html">5: X-Y Plots</a><br>
<a href="ContourPlots.html">6: Contour Plots</a><br>
<a href="Images.html">7: Image Plots</a><br>
<a href="Examples.html">8: Examples</a><br>
<a href="Commands.html">9: Gri Commands</a><br>
<a href="Programming.html">10: Programming</a><br>
<a href="Environment.html">11: Environment</a><br>
<a href="Emacs.html">12: Emacs Mode</a><br>
<a href="History.html">13: History</a><br>
<a href="Installation.html">14: Installation</a><br>
<a href="Bugs.html">15: Gri Bugs</a><br>
<a href="TestSuite.html">16: Test Suite</a><br>
<a href="GriInThePress.html">17: Gri in Press</a><br>
<a href="Acknowledgments.html">18: Acknowledgments</a><br>
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<h2>12.7: Filename arguments when running gri</h2>
Usually, gri is run specifying only a gri command file to process, which
lends itself well to the gri-mode command `<font color="#82140F"><code>gri-run</code></font>'. But Gri can
be also invoked from the command line using optional arguments, usually
filenames but not necessarily, e.g.
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$ gri somefile.gri datafile.dat datafile2.dat ...
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or
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$ gri somefile.gri *.dat
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The arguments are accessed with RPN operators `<font color="#82140F"><samp>argc</samp></font>' and
`<font color="82140F"><samp>argv</samp></font>' (see <a href="UnaryOperators.html#UnaryOperators">Unary Operators</a>).
<p>
gri-mode provides a method to set the arguments (usually filenames) to
use when `<font color="#82140F"><code>gri-run</code></font>' is called in a specific gri script. Use the
gri-mode command `<font color="#82140F"><code>gri-set-command-postarguments</code></font>' to setup a
string that gri-mode will use, and the gri-mode command
`<font color="#82140F"><code>gri-unset-command-postarguments</code></font>' to clear it. For ease-of-use,
these commands are made available from the menubar under the
`<font color="#82140F"><code>Perform -> Run Settings</code></font>' entries. The specified string will be
stored in the locally-defined (aka buffer-local) variable
`<font color="#82140F"><code>gri-command-postarguments</code></font>' and will be written within a gri
comment at the bottom of the file such that Emacs remembers it across
editing sessions.
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