countDistinct {SparkR}R Documentation

Count Distinct

Description

Count Distinct

Aggregate function: returns the number of distinct items in a group.

Usage

## S4 method for signature 'Column'
countDistinct(x, ...)

## S4 method for signature 'Column'
n_distinct(x, ...)

countDistinct(x, ...)

n_distinct(x, ...)

Value

the number of distinct items in a group.

See Also

Other agg_funcs: agg, summarize; approxCountDistinct, approxCountDistinct, approxCountDistinct; avg, avg; count, n, n; first, first; kurtosis, kurtosis; last, last; max; mean; min; sd, sd, stddev, stddev; skewness, skewness; stddev_pop, stddev_pop; stddev_samp, stddev_samp; sumDistinct, sumDistinct; sum; var_pop, var_pop; var_samp, var_samp; var, var, variance, variance

Examples

## Not run: countDistinct(df$c)
## Not run: n_distinct(df$c)

[Package SparkR version 1.6.1 Index]