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A.1.6 Sparse Matrices in OctFiles
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 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. Firstly, although it is fundamentally
possible to have Ndimensional sparse objects, the Octave sparse classes do
not allow them at this time. So all operations of the sparse classes
must be 2dimensional. This means that in fact SparseMatrix
is
similar to Octave's Matrix
class rather than its
NDArray
class.
A.1.6.1 The Differences between the Array and Sparse Classes  
A.1.6.2 Creating Sparse Matrices in OctFiles  
A.1.6.3 Using Sparse Matrices in OctFiles 