This function is used in Python Scripting.


Given a sequence of numerical values, calculates the simple standard deviation. Standard deviation is a calculated number for how close, or how far the values of that dataset are in relation to the mean. 

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

Client Permission Restrictions

This scripting function has no Client Permission restrictions.



  • Parameters

List[Float] values - A 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 standard deviation of the values parameter, or NaN if the values was empty or null.

  • Scope

Gateway, Vision Client, Perspective Session

Code Example
Code Snippet - Calculating Standard Deviation
# Create a list of values.
values = [3.5, 5.6, 7.8, 7.4, 3.8]
# Print the resulting value.
print system.math.standardDeviation(values)

system math standardDeviation, math.standardDeviation