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<h4 class="subsection">A.1.6 Sparse Matrices in Oct-Files</h4>
<p>There are three classes of sparse objects that are of interest to the
user.
<dl>
<dt><code>SparseMatrix</code><dd>A double precision sparse matrix class
<br><dt><code>SparseComplexMatrix</code><dd>A complex sparse matrix class
<br><dt><code>SparseBoolMatrix</code><dd>A boolean sparse matrix class
</dl>
<p>All of these classes inherit from the <code>Sparse<T></code> template class,
and so all have similar capabilities and usage. The <code>Sparse<T></code>
class was based on Octave <code>Array<T></code> class, and so users familiar
with Octave's <code>Array</code> classes will be comfortable with the use of
the sparse classes.
<p>The sparse classes will not be entirely described in this section, due
to their similarity with the existing <code>Array</code> classes. However,
there are a few differences due the different nature of sparse objects,
and these will be described. Firstly, although it is fundamentally
possible to have N-dimensional sparse objects, the Octave sparse classes do
not allow them at this time. So all operations of the sparse classes
must be 2-dimensional. This means that in fact <code>SparseMatrix</code> is
similar to Octave's <code>Matrix</code> class rather than its
<code>NDArray</code> class.
<ul class="menu">
<li><a accesskey="1" href="Array-and-Sparse-Differences.html#Array-and-Sparse-Differences">Array and Sparse Differences</a>
<li><a accesskey="2" href="Creating-Sparse-Matrices-in-Oct_002dFiles.html#Creating-Sparse-Matrices-in-Oct_002dFiles">Creating Sparse Matrices in Oct-Files</a>
<li><a accesskey="3" href="Using-Sparse-Matrices-in-Oct_002dFiles.html#Using-Sparse-Matrices-in-Oct_002dFiles">Using Sparse Matrices in Oct-Files</a>
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