matrixStats (version 0.14.2)

rowDiffs: Calculates difference for each row (column) in a matrix

Description

Calculates difference for each row (column) in a matrix.

Usage

rowDiffs(x, lag=1L, differences=1L, ...)
 colDiffs(x, lag=1L, differences=1L, ...)

Arguments

x

A numeric NxK matrix.

lag

An integer specifying the lag.

differences

An integer specifying the order of difference.

...

Not used.

Value

• Returns a numeric Nx(K-1) or (N-1)xK matrix.

See Also

See also diff2().

Examples

x <- matrix(1:27, ncol=3)

d1 <- rowDiffs(x)
print(d1)

d2 <- t(colDiffs(t(x)))
stopifnot(all.equal(d2, d1))