groupsum {arrayhelpers} | R Documentation |
rowsum
groupsum
extends rowsum
: it allows group
to be an array of the same shape
as x
.
groupsum( x, group = NULL, dim = 1L, reorder = TRUE, na.rm = FALSE, ..., drop = !is.array(x) )
x |
array to be |
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 |
na.rm |
shoud |
... |
ignored |
drop |
should 1d arrays drop to vectors? |
like rowsum
, but further dimensions of the array are preserved.
Claudia Beleites