groupsum: Extension of 'rowsum'

In arrayhelpers: Convenience Functions for Arrays

Description

groupsum extends rowsum: it allows group to be an array of the same shape as x.

Usage

groupsum(
  x,
  group = NULL,
  dim = 1L,
  reorder = TRUE,
  na.rm = FALSE,
  ...,
  drop = !is.array(x)
)

Arguments

x	array to be rowsummed
group	grouping variable (integer or factor) indicating groups of samples.
dim	along which dimension should the group sums be taken? (default: rows)
reorder	should the groups be ordered? see rowsum
na.rm	shoud NAs be removed?
...	ignored
drop	should 1d arrays drop to vectors?

Value

like rowsum, but further dimensions of the array are preserved.

Author(s)

Claudia Beleites

See Also

rowsum rowsum

arrayhelpers documentation built on Feb. 4, 2020, 5:06 p.m.