system.math.skewness
This function is used in Python Scripting.
Description​
Given a sequence of values, calculates the skewness (third central moment). Skewness is a measure of the degree of asymmetry of a distribution of the mean. If skewed to the left, the distribution has a long tail in the negative direction. If skewed to the right, the tail will be skewed in the positive direction. Skewness values greater than 1 or less than -1 indicate a highly skewed distribution, while skewness values between 0.5 and 1 or -0.5 and -1 indicate a moderately skewed distribution. Finally, skewness values between -0.5 and 0.5 indicate a more symmetrical distribution.
Returns NaN (Not a Number) if passed an empty sequence.
Client Permission Restrictions​
This scripting function has no Client Permission restrictions.
Syntax​
system.math.skewness(values)
Parameters​
| Type | Parameter | Description |
|---|---|---|
| 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 skewness of the values parameter, or NaN if values was empty or null.
Scope​
Gateway, Vision Client, Perspective Session
Code Examples​
# Create a list of values.
values = [3.5, 5.6, 7.8, 7.4, 3.8]
# Print the resulting value.
print system.math.skewness(values)
Keywords​
system math skewness, math.skewness