lowertri2mat: Transform a vector containing lower diagonal entries into a...

In changepoints: A Collection of Change-Point Detection Methods

Transform a vector containing lower diagonal entries into a symmetric matrix of dimension p.

Description

Transform a vector containing lower diagonal entries into a symmetric matrix of dimension p.

Usage

lowertri2mat(lowertri_vec, p, diag = FALSE)

Arguments

lowertri_vec	A numeric vector containing lower diagonal entries.
p	A integer scalar of dimensionality.
diag	A logic scalar indicating if the diagonal entries are contained in lowertri_vec.

Value

A numeric p x p symmetric matrix.

Author(s)

Haotian Xu

Examples

A = matrix(1:16, 4, 4)
B = lowertri2mat(A[lower.tri(A)], 4, diag = FALSE)
C = lowertri2mat(A[lower.tri(A, diag = TRUE)], 4, diag = TRUE)

changepoints documentation built on Sept. 4, 2022, 5:06 p.m.