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<H2>DESCRIPTION</H2>
<EM>s.perturb</EM>
reads a vector map of points and writes the same points but
<EM>perturbs</EM> the eastings and northings by
adding either a uniform or normal delta value. Perturbation means that
a variating spatial deviation is added to the coordinates.
<H2>NOTES</H2>
The uniform distribution is always centered about zero.
The associated parameter is constrained to be positive and
specifies the maximum of the distribution; the minimum is
the negation of that parameter.
<P>
Usually, the mean (first parameter) of the normal
distribution is zero (i.e., the distribution is centered at
zero). The standard deviation (second parameter) is
naturally constrained to be positive.
<P>
Output sites are not guaranteed to be contained within the
current geographic region.
<H2>SEE ALSO</H2>
<EM><A HREF="v.random.html">v.random</A></EM><br>
<EM><A HREF="v.univar.html">v.univar</A></EM><br>
<H2>AUTHOR</H2>
<A HREF="http://mccauley-usa.com/">James Darrell McCauley</A>
<A HREF="mailto:darrell@mccauley-usa.com"><darrell@mccauley-usa.com></A>,
<br>when he was at:
<A HREF="http://ABE.www.ecn.purdue.edu/ABE/">Agricultural Engineering</A>
<A HREF="http://www.purdue.edu/">Purdue University</A>
<P>
Random number generators originally written in FORTRAN by Wes Peterson and translated to C using <i>f2c</i>
<p><i>Last changed: $Date: 2004/10/16 10:26:48 $</i>
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