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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="Acknowledgments.html">17: Acknowledgments</a><br>
<a href="License.html">18: License</a><br>
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Indices:</br>
<a href="ConceptIndex.html"><i>Concepts</i></a><br>
<a href="CommandIndex.html"><i>Commands</i></a><br>
<a href="BuiltinIndex.html"><i>Variables</i></a><br>
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<h3>9.3.5: The `<font color="#82140F"><code>create</code></font>' commands</h3>
<UL>
<LI><a href="Create.html#CreateColumnsFromFunction">Create Columns From Function</a>: prepare to draw a function
<LI><a href="Create.html#CreateImageGrayscale">Create Image Grayscale</a>: prepare to draw banded image
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<h4>9.3.5.1: `<font color="#82140F"><code>create columns from function</code></font>'</h4>
<!-- latex: \index{create} -->
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<PRE>
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`create columns from function'
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Plot a function of x which is defined in synonym \function.
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<PRE>
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ENVIRONMENT
\function = function to plot.
\xmin = minimum x value
\xmax = maximum x value
\xinc = increment in x values
EXAMPLE
\function = "cos(x)"
\xmin = "0"
\xmax = "2 * 3.14"
\xinc = "0.1"
create columns from function
draw curve
</font></PRE>
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NOTE: This only works on machines which have the `<font color="#82140F"><code>awk</code></font>' command
available at the commandline. This means most unix machines and some
vax machines.
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<h4>9.3.5.2: `<font color="#82140F"><code>create image grayscale</code></font>'</h4>
<!-- latex: \index{create image grayscale} -->
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`create image grayscale banded .band.'
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Make a banded grayscale with in units of .band. pixel values each.
Thus, pixel values 0 to (.band. - 1) on the image will map to 0, while
values from .band. to (2 * .band. - 1) will map to .band., etc. For
example, .band. = 2 gives grayscale = (0 0 2 2 4 4 6 6 ... 252 252 254
254).
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