---
name: "v.univar.sh"
section: "1grass"
platform: "linux"
package: "grass-doc"
version: "6.4.4-1"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/v.univar.sh"
---

# v.univar.sh(1grass)

Calculates univariate statistics on selected table column for a GRASS vector map.

## 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: 2011-11-08 10:42:51 +0100 (Tue, 08 Nov 2011) $*

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© 2003-2014 GRASS Development Team