Calculates a entropy measure from a string of characters.
Function Traits: FieldComputationFunction
, Transformation
The parameter name for field
can be omitted; the following forms are equivalent:
logscale
shannonEntropy("value")
and:
logscale
shannonEntropy(field="value")
shannonEntropy()
Examples
Shows how to calculate a shannon entropy value for the string in a
field. An input event with the field
dns_name with the value
example.com
results in the field
entropy having the rounded value 3.095795.
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entropy := shannonEntropy(dns_name)