split.array: A 'split()' method for 'array' and 'matrix' types on a...

In statnet.common: Common R Scripts and Utilities Used by the Statnet Project Software

A split() method for array and matrix types on a margin.

Description

These methods split an array and matrix into a list of arrays or matrices with the same number of dimensions according to the specified margin.

Usage

## S3 method for class 'array'
split(x, f, drop = FALSE, margin = NULL, ...)

## S3 method for class 'matrix'
split(x, f, drop = FALSE, margin = NULL, ...)

Arguments

x	A matrix or an array.
f, drop	See help for split(). Note that drop here is not for array dimensions: these are always preserved.
margin	Which margin of the array to split along. NULL splits as split.default, dropping dimensions.
...	Additional arguments to split().

Examples

x <- diag(5)
f <- rep(1:2, c(2,3))
split(x, f, margin=1) # Split rows.
split(x, f, margin=2) # Split columns.

# This is similar to how data frames are split:
stopifnot(identical(split(x, f, margin=1),
          lapply(lapply(split(as.data.frame(x), f), as.matrix), unname)))

statnet.common documentation built on Oct. 6, 2024, 5:06 p.m.