head,DataFrame-method {SparkR}R Documentation

Head

Description

Return the first NUM rows of a DataFrame as a data.frame. If NUM is NULL, then head() returns the first 6 rows in keeping with the current data.frame convention in R.

Usage

## S4 method for signature 'DataFrame'
head(x, num = 6L)

Arguments

x

A SparkSQL DataFrame

num

The number of rows to return. Default is 6.

Value

A data.frame

Examples

## Not run: 
##D sc <- sparkR.init()
##D sqlContext <- sparkRSQL.init(sc)
##D path <- "path/to/file.json"
##D df <- jsonFile(sqlContext, path)
##D head(df)
## End(Not run)

[Package SparkR version 1.4.1 Index]