mat_head_group: Take first groups

In MatthieuStigler/matPkg: Mat functions

Take first groups

Description

Take first groups

Usage

mat_head_group(df, ..., n_head = 5, slice = FALSE)

Arguments

df	data
...	grouping vars
n_head	Number of groups
slice	Whether n_head indicates row position

Examples

df <- data.frame(group_a = rep(LETTERS[1:3], each=4),
                 group_b = rep(letters[1:2], 6),dat = 1:12)
mat_head_group(df, group_a, n_head=1)
mat_head_group(df, group_a, group_b, n_head=1)

## Use as slice: select second group only, not up to 2:
mat_head_group(df, group_a, n_head=2, slice=TRUE)
mat_head_group(df, group_a, n_head=c(2,3), slice=TRUE)

MatthieuStigler/matPkg documentation built on Sept. 19, 2024, 5:19 a.m.