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<h3 class="section">38.4 Evaluation of B-splines</h3>
<p><a name="index-basis-splines_002c-evaluation-2432"></a>
<div class="defun">
— Function: int <b>gsl_bspline_eval</b> (<var>const double x, gsl_vector * B, gsl_bspline_workspace * w</var>)<var><a name="index-gsl_005fbspline_005feval-2433"></a></var><br>
<blockquote><p>This function evaluates all B-spline basis functions at the position
<var>x</var> and stores them in <var>B</var>, so that the ith element
of <var>B</var> is B_i(x). <var>B</var> must be of length
n = nbreak + k - 2. This value is also stored in <code>w->n</code>.
It is far more efficient to compute all of the basis functions at
once than to compute them individually, due to the nature of the
defining recurrence relation.
</p></blockquote></div>
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