sp2Matrix {asreml}R Documentation

Convert sparse matrix to Matrix object

Description

Function that converts a sparse matrix in three-column coordinate form to a Matrix object.

Usage

sp2Matrix(x, dense = FALSE, triplet = FALSE)

Arguments

x

A three-column matrix containing the row and column indices and the matrix element, respectively, of the sparse matrix.

dense

If TRUE, the result is stored as a dense symmetric dspMatrix object, otherwise a sparse symmetric matrix (dsCMatrix or dsTMatrix, depending on the choice of the triple argument) is returned (default = FALSE).

triplet

If TRUE, the result is a dsTMatrix object (triplet form), otherwise a dsCMatrix object is returned (default = FALSE).

Details

If the sparse matrix inherits class ginv, the returned object preserves the A^{-1} attributes.

[Package asreml version 4.2.0.480 Index]