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<a name="Initializing-the-B_002dsplines-solver"></a>
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<p>
Next: <a href="Constructing-the-knots-vector.html#Constructing-the-knots-vector" accesskey="n" rel="next">Constructing the knots vector</a>, Previous: <a href="Overview-of-B_002dsplines.html#Overview-of-B_002dsplines" accesskey="p" rel="previous">Overview of B-splines</a>, Up: <a href="Basis-Splines.html#Basis-Splines" accesskey="u" rel="up">Basis Splines</a> &nbsp; [<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Initializing-the-B_002dsplines-solver-1"></a>
<h3 class="section">40.2 Initializing the B-splines solver</h3>
<a name="index-basis-splines_002c-initializing"></a>

<p>The computation of B-spline functions requires a preallocated
workspace of type <code>gsl_bspline_workspace</code>.
</p>
<dl>
<dt><a name="index-gsl_005fbspline_005falloc"></a>Function: <em>gsl_bspline_workspace *</em> <strong>gsl_bspline_alloc</strong> <em>(const size_t <var>k</var>, const size_t <var>nbreak</var>)</em></dt>
<dd><a name="index-gsl_005fbspline_005fworkspace"></a>
<p>This function allocates a workspace for computing B-splines of order
<var>k</var>. The number of breakpoints is given by <var>nbreak</var>. This
leads to <em>n = nbreak + k - 2</em> basis functions. Cubic B-splines
are specified by <em>k = 4</em>. The size of the workspace is
<em>O(2k^2 + 5k + nbreak)</em>.
</p></dd></dl>

<dl>
<dt><a name="index-gsl_005fbspline_005ffree"></a>Function: <em>void</em> <strong>gsl_bspline_free</strong> <em>(gsl_bspline_workspace * <var>w</var>)</em></dt>
<dd><p>This function frees the memory associated with the workspace <var>w</var>.
</p></dd></dl>




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