Geografic-Information-System/raster/r.surf.random/r.surf.random.html

<h2>DESCRIPTION</h2>

<b>r.surf.random</b> produces a raster map layer of uniform random deviates
whose range can be expressed by the user. It is essentialy the same as
<em>r.surf.gauss</em>, but uses a linear random number generator instead.
It uses the random number generator drand48() or rand()<!-- cite? -->,
depending on the user's platform.

<p><center>
<img src="r_surf_random_hist.png" alt="r.surf.random map histogram"><br>
<i>Histogram of map generated with r.surf.random</i>
</center>

<h2>EXAMPLE</h2>

<div class="code"><pre>
g.region -p n=228500 s=215000 w=630000 e=645000 res=10
r.surf.random out=random min=0 max=100

# check result
r.univar random
</pre></div>

<h2>SEE ALSO</h2>

<em>
<a href="r.random.surface.html">r.random.surface</a>, 
<a href="r.surf.contour.html">r.surf.contour</a>,
<a href="r.surf.fractal.html">r.surf.fractal</a>,
<a href="r.surf.gauss.html">r.surf.gauss</a>,
<a href="r.surf.idw.html">r.surf.idw</a>,
<a href="v.surf.rst.html">v.surf.rst</a>
</em>

<h2>AUTHOR</h2>

Jo Wood<br>
Midlands Regional Research Laboratory (ASSIST)<br>
University of Leicester<br>
<i>October 1991</i>
<br>

<!-- almost certainly no longer valid
<address>jwo at le.ac.uk</address>

<br><a href="http://www.geog.le.ac.uk/assist/index.html">ASSIST's home</a>
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