takeSample {SparkR}R Documentation

Return a list of the elements that are a sampled subset of the given RDD.

Description

Return a list of the elements that are a sampled subset of the given RDD.

Usage

takeSample(rdd, withReplacement, num, seed)

## S4 method for signature 'RDD,logical,integer,integer'
takeSample(rdd, withReplacement, num,
  seed)

Arguments

rdd

The RDD to sample elements from

withReplacement

Sampling with replacement or not

num

Number of elements to return

seed

Randomness seed value

Examples

## Not run: 
##D sc <- sparkR.init()
##D rdd <- parallelize(sc, 1:100)
##D # exactly 5 elements sampled, which may not be distinct
##D takeSample(rdd, TRUE, 5L, 1618L)
##D # exactly 5 distinct elements sampled
##D takeSample(rdd, FALSE, 5L, 16181618L)
## End(Not run)
[Package SparkR version 0.1 Index]