v.univar.sh.1grass

Langue: en

Version: 337895 (ubuntu - 24/10/10)

Section: 1 (Commandes utilisateur)

NAME

v.univar.sh - Calculates univariate statistics on selected table column for a GRASS vector map.

KEYWORDS

vector, statistics

SYNOPSIS

v.univar.sh
v.univar.sh help
v.univar.sh [-e] table=string column=string [database=string] [driver=string] [where=string] [--verbose] [--quiet]

Flags:

-e

Extended statistics (quartiles and 90th percentile)
--verbose

Verbose module output
--quiet

Quiet module output

Parameters:

table=string

Name of data table
column=string

Column on which to calculate statistics (must be numeric)
database=string

Database/directory for table
driver=string

Database driver
where=string

WHERE conditions of SQL statement without 'where' keyword

DESCRIPTION

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 is closely based on r.univar.sh and uses db.select to create a list values for statistical calculations. This script could be replaced by an updated v.univar.

(GRASS Shell Script)

NOTES

If the database and driver are not specified, the module will use the default values set in db.connect.

EXAMPLE


g.region rast=elevation.10m -p
v.random out=samples n=100
v.db.addtable samples col="heights double precision"
v.what.rast samples rast=elevation.10m col=heights
v.db.select samples

v.univar.sh samples col=heights

SEE ALSO

r.univar, r.univar.sh, v.univar,, db.select, d.vect.thematic


 AUTHORS v.univar.sh: Michael Barton, Arizona State University

and authors of r.univar.sh

Last changed: $Date: 2008-03-13 09:01:14 +0100 (gio, 13 mar 2008) $

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