Important: The linalg package has been deprecated. Use the superseding command LinearAlgebra[Matrix], instead.

- For information on migrating linalg code to the new packages, see examples/LinearAlgebraMigration.

The call extend(A, m, n, x) returns a new matrix which is a copy of the matrix A with m additional rows and n additional columns. The new entries are initialized to x.

If the optional fourth argument x is omitted, then the matrix is extended by m rows and n columns but the entries in those rows and columns are not assigned.

The command with(linalg,extend) allows the use of the abbreviated form of this command.

$\mathrm{with}\left(\mathrm{linalg}\right)\:$

$A≔\mathrm{matrix}\left(2\,2\,\left[1\,2\,3\,4\right]\right)$

$A≔\left[\begin{array}{cc}1& 2\\ 3& 4\end{array}\right]$

$\mathrm{extend}\left(A\,1\,1\,0\right)$

$\left[\begin{array}{ccc}1& 2& 0\\ 3& 4& 0\\ 0& 0& 0\end{array}\right]$