drSample: Take a Sample of Key-Value Pairs Take a sample of key-value...

In datadr: Divide and Recombine for Large, Complex Data

Description

Take a Sample of Key-Value Pairs Take a sample of key-value Pairs

Usage

drSample(x, fraction, output = NULL, overwrite = FALSE, control = NULL)

Arguments

x	a 'ddo' or 'ddf' object
fraction	fraction of key-value pairs to keep (between 0 and 1)
output	a "kvConnection" object indicating where the output data should reside (see localDiskConn, hdfsConn). If NULL (default), output will be an in-memory "ddo" object.
overwrite	logical; should existing output location be overwritten? (also can specify overwrite = "backup" to move the existing output to _bak)
control	parameters specifying how the backend should handle things (most-likely parameters to rhwatch in RHIPE) - see rhipeControl and localDiskControl

Examples

bySpecies <- divide(iris, by = "Species")
set.seed(234)
sampleRes <- drSample(bySpecies, fraction = 0.25)

datadr documentation built on May 1, 2019, 8:06 p.m.