pyspark.RDD.sampleStdev#
- RDD.sampleStdev()[source]#
Compute the sample standard deviation of this RDD’s 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
Examples
>>> sc.parallelize([1, 2, 3]).sampleStdev() 1.0