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pyspark.RDD.sampleStdev#

RDD.sampleStdev()[source]#

Compute the sample standard deviation of this RDDs elements (which corrects for bias in estimating the standard deviation by dividing by N-1 instead of N).

New in version 0.9.1.

Returns
float

the sample standard deviation of all elements

See also

RDD.stats()
RDD.stdev()
RDD.variance()
RDD.sampleVariance()

Examples

>>> sc.parallelize([1, 2, 3]).sampleStdev()
1.0

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