Provides the spread of distribution.

Syntax

V = Variance(Data)

Argument

Name

Description

Data

A scalar, vector or matrix of data.

Output

Name

Description

V

The variance of the data. If the input is a matrix, then the median of each column is returned in a vector.

Example

Find the variance of the data set [1,2,3,5,6].

Syntax

v = Variance([1,2,3,5,6])

Result

v = 4.3

Comments

The following equation is used to calculate variance:

∑(yi – ŷ)2 / (N-1)

Where N is the number of samples.

See Also:

Descriptive Statistics