magic (version 1.3-20)

apad: Pad arrays

Description

Multidimensional pad for arrays of arbitrary dimension

Usage

apad(a, l, e = NULL, method = "ext", post = TRUE)

Arguments

a

Array to be padded

l

Amount of padding to add. If a vector, it is interpreted as the extra extent of a along each of its dimensions (standard recycling is used). If a scalar, interpret as the dimension to be padded, in which case the amount is given

e

If l is a scalar, amount of padding to add to dimension l.

method

String, with three possibilities: ext, mirror, and rep.

The first, ext, uses a padding value given by the nearest element of a, as measured by the Manhattan

post

Boolean, with default TRUE meaning to append to a and FALSE meaning to prepend.

See Also

adiag

Examples

apad(1:10,4,method="mirror")


a <- matrix(1:30,5,6)

apad(a,c(4,4))
apad(a,c(4,4),post=FALSE)

apad(a,1,5)

apad(a,c(5,6),method="mirror")
apad(a,c(5,6),method="mirror",post=FALSE)