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There are three classes of sparse objects that are of interest to the user.

`SparseMatrix`

A double precision sparse matrix class

`SparseComplexMatrix`

A complex sparse matrix class

`SparseBoolMatrix`

A boolean sparse matrix class

All of these classes inherit from the `Sparse<T>`

template class,
and so all have similar capabilities and usage. The `Sparse<T>`

class was based on Octave’s `Array<T>`

class, and so users familiar
with Octave’s `Array`

classes will be comfortable with the use of
the sparse classes.

The sparse classes will not be entirely described in this section, due
to their similarity with the existing `Array`

classes. However,
there are a few differences due the different nature of sparse objects,
and these will be described. First, although it is fundamentally
possible to have N-dimensional sparse objects, the Octave sparse classes do
not allow them at this time; All instances of the sparse classes
must be 2-dimensional. This means that `SparseMatrix`

is actually
more similar to Octave’s `Matrix`

class than its `NDArray`

class.

• Array and Sparse Class Differences: | ||

• Creating Sparse Matrices in Oct-Files: | ||

• Using Sparse Matrices in Oct-Files: |