Geografic-Information-System/scripts/db.univar/db.univar.html

<h2>DESCRIPTION</h2>

<em>db.univar</em> calculates basic univariate statistics for numeric
attributes in a data table. It will calculate minimum, maximum, range, mean,
standard deviation, variance, coefficient of variation, quartiles, median, and
90th percentile.
It uses <em>db.select</em> to create list values for statistical calculations.

<em>NOTES</em>

If the database and driver are not specified, the default values set in
<em>db.connect</em> will be used.

<h2>EXAMPLE</h2>

In this example, random points are sampled from the elevation map
(North Carolina sample dataset) and univariate statistics performed:

<div class="code"><pre>
g.region raster=elevation -p
v.random output=samples n=100
v.db.addtable samples column="heights double precision"
v.what.rast samples raster=elevation column=heights
v.db.select samples

db.univar samples column=heights
</pre></div>

<h2>SEE ALSO</h2>

<em>
<a href="v.db.univar.html">v.db.univar</a>,
<a href="r.univar.html">r.univar</a>,
<a href="v.univar.html">v.univar</a>,
<a href="db.select.html">db.select</a>,
<a href="d.vect.thematic.html">d.vect.thematic</a>
</em>

<h2>AUTHOR</h2>
 Michael Barton, Arizona State University
<p>and authors of <em>r.univar.sh</em>

<p><i>Last changed: $Date$</i>