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Version: 8.1

system.math.variance

This function is used in Python Scripting.

Description

Given a sequence of values, calculates the variance of all values. Variance measures how far values in a set are spread out from their mean value.

Returns NaN (Not a Number) if passed an empty sequence.

Client Permission Restrictions

This scripting function has no Client Permission restrictions.

Syntax

system.math.variance(values)

Parameters

TypeParameterDescription
List[Float]valuesA sequence of numerical values. Accepts both integers and floats. The sequence may not contain None type values. However, passing a None type object instead of a sequence of numerical values will return NaN.

Returns

Float - The variance of all values in the values parameter, or NaN if the input was empty or null.

Scope

Gateway, Vision Client, Perspective Session

Code Examples

Example #1
# Create a list of values.
values = [3.5, 5.6, 7.8, 7.4, 3.8]

# Print the resulting value.
print system.math.variance(values)

Keywords

system math variance, math.variance