Important: The linalg package has been deprecated. Use the superseding commands, LinearAlgebra[MatrixAdd] and LinearAlgebra[VectorAdd], instead.

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

The function  matadd(A, B) computes the matrix (vector) sum of A and B.

If the optional scalar parameters c1 and c2 are given, then matadd computes the matrix (vector) sum $\mathrm{c1}A+\mathrm{c2}B$.

The evalm command is an easy method of accessing matadd.

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

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

$A≔\mathrm{matrix}\left(3\,3\,\left[1\,2\,3\,2\,3\,4\,3\,4\,5\right]\right)$

$A≔\left[\begin{array}{ccc}1& 2& 3\\ 2& 3& 4\\ 3& 4& 5\end{array}\right]$

$B≔\mathrm{array}\left(1..3\,1..3\,\mathrm{identity}\right)$

$B≔\left[\begin{array}{ccc}1& 0& 0\\ 0& 1& 0\\ 0& 0& 1\end{array}\right]$

$\mathrm{matadd}\left(A\,B\,1\,10\right)$

$\left[\begin{array}{ccc}11& 2& 3\\ 2& 13& 4\\ 3& 4& 15\end{array}\right]$

$v≔\mathrm{vector}\left(3\,\left[2\,3\,4\right]\right)$

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

$u≔\mathrm{vector}\left(3\,\left[-3\,1\,-5\right]\right)$

$u≔\left[\begin{array}{ccc}\mathrm{-3}& 1& \mathrm{-5}\end{array}\right]$

$\mathrm{matadd}\left(u\,v\,-2\,1\right)$

$\left[\begin{array}{ccc}8& 1& 14\end{array}\right]$

$\mathrm{matadd}\left(\mathrm{transpose}\left(u\right)\,\mathrm{transpose}\left(v\right)\right)$

$\mathrm{transpose}\left(\left[\begin{array}{ccc}\mathrm{-1}& 4& \mathrm{-1}\end{array}\right]\right)$