group_trim

In [1]:

# https://dplyr.tidyverse.org/reference/group_trim.html
%run nb_helpers.py

from datar.all import *

nb_header(group_trim)

# https://dplyr.tidyverse.org/reference/group_trim.html %run nb_helpers.py from datar.all import * nb_header(group_trim)

Try this notebook on binder.

★ group_trim

¶

Remove empty groups¶

The original API:
https://dplyr.tidyverse.org/reference/group_trim.html

Args:¶

  _data: A grouped frame
  _drop: See group_by.

Returns:¶

  A grouped frame

In [3]:

df = tibble(x=factor(["a", "b"], levels=list("abc")))
df >> group_by(f.x, _drop=False) >> group_data()

df = tibble(x=factor(["a", "b"], levels=list("abc"))) df >> group_by(f.x, _drop=False) >> group_data()

Out[3]:

	x	_rows
	<category>	<object>
0	a	[0]
1	b	[1]
2	c	[]

In [4]:

df >> group_by(f.x, _drop=False) >> group_trim() >> group_data()

df >> group_by(f.x, _drop=False) >> group_trim() >> group_data()

Out[4]:

	x	_rows
	<category>	<object>
0	a	[0]
1	b	[1]