DESCRIPTION
v.db.univar calculates basic univariate statistics for numeric
attributes in a vector attribute table. It will calculate minimum,
maximum, range, mean, standard deviation, variance, coefficient of
variation, quartiles, median, and 90th percentile.
It uses db.select to create list values for statistical calculations.
NOTES
A database connection must be defined for the selected vector layer.
EXAMPLE
In this example, random points are sampled from the elevation map
(North Carolina sample dataset) and univariate statistics performed:
g.region rast=elevation -p
v.random output=samples n=100
v.db.addtable samples column="heights double precision"
v.what.rast samples raster=elevation colum=heights
v.db.select samples
v.db.univar samples colum=heights
SEE ALSO
db.univar,
r.univar,
v.univar,
db.select,
d.vect.thematic
AUTHOR
Michael Barton, Arizona State University
and authors of r.univar.sh
Last changed: $Date: 2013-07-16 16:37:10 +0200 (Tue, 16 Jul 2013) $