n: Number of items in current group

In multiplyr: Data Manipulation with Parallelism and Shared Memory Matrices

Description

Number of items in current group

Usage

n()

Value

Number of items in current group (or node if ungrouped)

See Also

Other utility functions: between, cumall, cumany, cummean, distribute, first, lag, last, lead, n_distinct, n_groups, nth

Examples

dat <- Multiplyr (x=1:100, G=rep(1:4, each=25), cl=2)
dat %>% group_by (G)
dat %>% summarise (G.size = n())
dat %>% shutdown()

multiplyr documentation built on May 30, 2017, 12:09 a.m.