acorn

0th

Percentile

Return a corner of an array object (like head)

Return a small corner of an array object, like head() or tail() but taking only a few slices on each dimension.

Keywords
array , manip
Usage
acorn(x, n=6, m=5, r=1, ...)
Arguments
x
An array (including a matrix or a data frame)
n,m,r
Numbers of items on each dimension. A negative number is interpreted as this many items at the end (like tail).
...
Further arguments specifying numbers of slices to return on each dimension.
Details

Like head() for multidimensional arrays, with two differences: (1) returns just a few items on each dimension, and (2) negative numbers are treated like tail().

Value

An object like x with fewer elements on each dimension.

Aliases
  • acorn
  • ahead
  • acorn.default
Examples
x <- array(1:24,dim=c(4,3,2),dimnames=rev(list(letters[1:2],LETTERS[1:3],letters[23:26])))
acorn(x)
acorn(x, 3)
acorn(x, -3)
acorn(x, 3, -2)
Documentation reproduced from package abind, version 1.4-5, License: LGPL (>= 2)

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