vech: Half-vectorization

In OpenMx: Extended Structural Equation Modelling

Half-vectorization

Description

This function returns the half-vectorization of an input matrix as a column vector.

Usage

vech(x)

Arguments

x	an input matrix.

Details

The half-vectorization of an input matrix consists of the elements in the lower triangle of the matrix, including the elements along the diagonal of the matrix, as a column vector. The column vector is created by traversing the matrix in column-major order.

See Also

vech2full, vechs, rvectorize, cvectorize

Examples

vech(matrix(1:9, 3, 3))
vech(matrix(1:12, 3, 4))

OpenMx documentation built on Oct. 19, 2024, 9:06 a.m.