db.univar(1grass)

Usage

db.univar

db.univar --help

db.univar [-eg] table=name column=name [database=name] [driver=name] [where=sql_query] [percentile=float [,float, ...]] [format=string] [--help] [--verbose] [--quiet] [--ui]

Keywords

database, statistics, attribute table

Overview

db.univar 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 db.select to create list values for statistical calculations. NOTES If the database and driver are not specified, the default values set in db.connect will be used.

Examples

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

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

Source code

Available at: db.univar source code (history)

Accessed: Monday Feb 24 17:51:43 2025

Releases

5 releases since Debian 9 (Stretch); the text changed 4 times.

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