| countDistinct {SparkR} | R Documentation |
Count Distinct
Aggregate function: returns the number of distinct items in a group.
## S4 method for signature 'Column' countDistinct(x, ...) ## S4 method for signature 'Column' n_distinct(x, ...) countDistinct(x, ...) n_distinct(x, ...)
the number of distinct items in a group.
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
## Not run: countDistinct(df$c)
## Not run: n_distinct(df$c)