Calculates the standard deviation for a field over a set of events. The result is returned in a field named _stddev

ParameterTypeRequiredDefault ValueDescription
asstringoptional[a]_stddev Name of output field.
field[b]stringrequired  Field to extract a number from and calculate standard deviation over.

[a] Optional parameters use their default value unless explicitly set.

[b] The parameter name field can be omitted.

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stdDev() Examples

Find the standard deviation of bytes send in http responses

logscale
stdDevBytes := stdDev(field=bytes_sent)