sampleBy: Returns a stratified sample without replacement

In danzafar/tidyspark: A Tidy Interface to Spark

Description

Returns a stratified sample without replacement based on the fraction given on each stratum.

Usage

sampleBy(x, col, fractions, seed)

Arguments

x	A spark_tbl
col	column that defines strata
fractions	A named list giving sampling fraction for each stratum. If a stratum is not specified, we treat its fraction as zero.
seed	random seed

Value

A new spark_tbl that represents the stratified sample

Note

sampleBy since 1.6.0

See Also

Other stat functions: approxQuantile(), corr(), covariance(), crosstab(), freqItems()

Examples

## Not run: 
df <- read.json("/path/to/file.json")
sample <- sampleBy(df, "key", fractions, 36)

## End(Not run)

danzafar/tidyspark documentation built on Sept. 30, 2020, 12:19 p.m.