diagonals (version 0.2.0)

rectangle_matrix: Rectangle Matrix

Description

Rectangle Matrix

Usage

rectangle_matrix(x, steps = NULL, size = NULL, replacement = 0)

Arguments

x

a matrix where the dimensions are both multiples of size

steps

the required number of steps (block matrices) across the diagonal

size

the largest dimension of the matrix being selected over the diagonal of matrix

replacement

value to be inserted off the diagonal, by default this is zero (0).

Examples

# create a non-square matrix
nsm <- matrix(1:27, nrow=9, ncol=3 )

# check that both dimensions are multiples of steps=3
dim(nsm) %% 3 == c(0, 0)

# select the diagonal matrix
rectangle_matrix(nsm, steps=3)