pyspark.RDD.sampleVariance

RDD.sampleVariance()

Compute the sample variance of this RDD’s elements (which corrects for bias in estimating the variance by dividing by N-1 instead of N).

New in version 0.9.1.

Returns

float

the sample variance of all elements

See also

RDD.stats()

RDD.variance()

RDD.stdev()

RDD.sampleStdev()

Examples

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