n_groups: Return number of groups

In multiplyr: Data Manipulation with Parallelism and Shared Memory Matrices

Description

Return number of groups

Usage

n_groups(.self)

Arguments

.self

Data frame

Value

Number of groups in data frame

See Also

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

Examples

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

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