hof_filter: Filter Array Column

In rstudio/sparklyr: R Interface to Apache Spark

Filter Array Column

Description

Apply an element-wise filtering function to an array column (this is essentially a dplyr wrapper for the filter(array<T>, function<T, Boolean>): array<T> built-in Spark SQL functions)

Usage

hof_filter(x, func, expr = NULL, dest_col = NULL, ...)

Arguments

x	The Spark data frame to filter
func	The filtering function
expr	The array being filtered, could be any SQL expression evaluating to an array (default: the last column of the Spark data frame)
dest_col	Column to store the filtered result (default: expr)
...	Additional params to dplyr::mutate

Examples

## Not run: 

library(sparklyr)
sc <- spark_connect(master = "local")
# only keep odd elements in each array in `array_column`
copy_to(sc, dplyr::tibble(array_column = list(1:5, 21:25))) %>%
  hof_filter(~ .x %% 2 == 1)

## End(Not run)

rstudio/sparklyr documentation built on Sept. 18, 2024, 6:10 a.m.