full(X) returns a dense Vector, Matrix, or Array corresponding to X.

issparse(X) returns true when X is a Vector, Matrix, or Array with sparse storage and false otherwise.

If n is an integer and m is omitted, the resulting matrix is square.

If the input X is an array, its elements are used as the dimensions of the matrix.

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

$S≔\mathrm{Matrix}\left(\left[\left[7\,4\,0\right]\,\left[0\,2\,0\right]\,\left[0\,0\,6\right]\right]\,\mathrm{storage}=\mathrm{sparse}\right)$

$S≔\left[\begin{array}{ccc}7& 4& 0\\ 0& 2& 0\\ 0& 0& 6\end{array}\right]$

$\mathrm{full}\left(S\right)$

$\left[\begin{array}{ccc}7& 4& 0\\ 0& 2& 0\\ 0& 0& 6\end{array}\right]$

$M≔\mathrm{full}\left(\mathrm{speye}\left(4\,5\right)\right)$

$M≔\left[\begin{array}{ccccc}1& 0& 0& 0& 0\\ 0& 1& 0& 0& 0\\ 0& 0& 1& 0& 0\\ 0& 0& 0& 1& 0\end{array}\right]$

$\mathrm{issparse}\left(S\right)$

$\mathrm{true}$

$\mathrm{issparse}\left(M\right)$

$\mathrm{false}$

The MTM[full] and MTM[issparse] commands were introduced in Maple 2021.

For more information on Maple 2021 changes, see Updates in Maple 2021.