pyspark.RDD.sampleVariance#

RDD.sampleVariance()[source]#

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).

Added 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