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Next: <a href="Sparse-Matrices-Reading-and-Writing.html#Sparse-Matrices-Reading-and-Writing" accesskey="n" rel="next">Sparse Matrices Reading and Writing</a>, Previous: <a href="Sparse-Matrices-Accessing-Elements.html#Sparse-Matrices-Accessing-Elements" accesskey="p" rel="previous">Sparse Matrices Accessing Elements</a>, Up: <a href="Sparse-Matrices.html#Sparse-Matrices" accesskey="u" rel="up">Sparse Matrices</a> &nbsp; [<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Initializing-Matrix-Elements"></a>
<h3 class="section">41.4 Initializing Matrix Elements</h3>
<a name="index-sparse-matrices_002c-initializing-elements"></a>

<p>Since the sparse matrix format only stores the non-zero elements, it is automatically
initialized to zero upon allocation. The function <code>gsl_spmatrix_set_zero</code> may
be used to re-initialize a matrix to zero after elements have been added to it.
</p>
<dl>
<dt><a name="index-gsl_005fspmatrix_005fset_005fzero"></a>Function: <em>int</em> <strong>gsl_spmatrix_set_zero</strong> <em>(gsl_spmatrix * <var>m</var>)</em></dt>
<dd><p>This function sets (or resets) all the elements of the matrix <var>m</var> to zero.
</p></dd></dl>




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