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<a name="g_t1D-Higher_002dlevel-Interface"></a>
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Next: <a href="1D-Interpolation-Example-programs.html#g_t1D-Interpolation-Example-programs" accesskey="n" rel="next">1D Interpolation Example programs</a>, Previous: <a href="1D-Evaluation-of-Interpolating-Functions.html#g_t1D-Evaluation-of-Interpolating-Functions" accesskey="p" rel="previous">1D Evaluation of Interpolating Functions</a>, Up: <a href="Interpolation.html#Interpolation" accesskey="u" rel="up">Interpolation</a> &nbsp; [<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
<a name="g_t1D-Higher_002dlevel-Interface-1"></a>
<h3 class="section">28.6 1D Higher-level Interface</h3>

<p>The functions described in the previous sections required the user to
supply pointers to the <em>x</em> and <em>y</em> arrays on each call.  The
following functions are equivalent to the corresponding
<code>gsl_interp</code> functions but maintain a copy of this data in the
<code>gsl_spline</code> object.  This removes the need to pass both <var>xa</var>
and <var>ya</var> as arguments on each evaluation. These functions are
defined in the header file <samp>gsl_spline.h</samp>.
</p>
<dl>
<dt><a name="index-gsl_005fspline_005falloc"></a>Function: <em>gsl_spline *</em> <strong>gsl_spline_alloc</strong> <em>(const gsl_interp_type * <var>T</var>, size_t <var>size</var>)</em></dt>
<dd><a name="index-gsl_005fspline"></a>
</dd></dl>

<dl>
<dt><a name="index-gsl_005fspline_005finit"></a>Function: <em>int</em> <strong>gsl_spline_init</strong> <em>(gsl_spline * <var>spline</var>, const double <var>xa</var>[], const double <var>ya</var>[], size_t <var>size</var>)</em></dt>
</dl>

<dl>
<dt><a name="index-gsl_005fspline_005ffree"></a>Function: <em>void</em> <strong>gsl_spline_free</strong> <em>(gsl_spline * <var>spline</var>)</em></dt>
</dl>

<dl>
<dt><a name="index-gsl_005fspline_005fname"></a>Function: <em>const char *</em> <strong>gsl_spline_name</strong> <em>(const gsl_spline * <var>spline</var>)</em></dt>
</dl>

<dl>
<dt><a name="index-gsl_005fspline_005fmin_005fsize"></a>Function: <em>unsigned int</em> <strong>gsl_spline_min_size</strong> <em>(const gsl_spline * <var>spline</var>)</em></dt>
</dl>

<dl>
<dt><a name="index-gsl_005fspline_005feval"></a>Function: <em>double</em> <strong>gsl_spline_eval</strong> <em>(const gsl_spline * <var>spline</var>, double <var>x</var>, gsl_interp_accel * <var>acc</var>)</em></dt>
<dt><a name="index-gsl_005fspline_005feval_005fe"></a>Function: <em>int</em> <strong>gsl_spline_eval_e</strong> <em>(const gsl_spline * <var>spline</var>, double <var>x</var>, gsl_interp_accel * <var>acc</var>, double * <var>y</var>)</em></dt>
</dl>

<dl>
<dt><a name="index-gsl_005fspline_005feval_005fderiv"></a>Function: <em>double</em> <strong>gsl_spline_eval_deriv</strong> <em>(const gsl_spline * <var>spline</var>, double <var>x</var>, gsl_interp_accel * <var>acc</var>)</em></dt>
<dt><a name="index-gsl_005fspline_005feval_005fderiv_005fe"></a>Function: <em>int</em> <strong>gsl_spline_eval_deriv_e</strong> <em>(const gsl_spline * <var>spline</var>, double <var>x</var>, gsl_interp_accel * <var>acc</var>, double * <var>d</var>)</em></dt>
</dl>

<dl>
<dt><a name="index-gsl_005fspline_005feval_005fderiv2"></a>Function: <em>double</em> <strong>gsl_spline_eval_deriv2</strong> <em>(const gsl_spline * <var>spline</var>, double <var>x</var>, gsl_interp_accel * <var>acc</var>)</em></dt>
<dt><a name="index-gsl_005fspline_005feval_005fderiv2_005fe"></a>Function: <em>int</em> <strong>gsl_spline_eval_deriv2_e</strong> <em>(const gsl_spline * <var>spline</var>, double <var>x</var>, gsl_interp_accel * <var>acc</var>, double * <var>d2</var>)</em></dt>
</dl>

<dl>
<dt><a name="index-gsl_005fspline_005feval_005finteg"></a>Function: <em>double</em> <strong>gsl_spline_eval_integ</strong> <em>(const gsl_spline * <var>spline</var>, double <var>a</var>, double <var>b</var>, gsl_interp_accel * <var>acc</var>)</em></dt>
<dt><a name="index-gsl_005fspline_005feval_005finteg_005fe"></a>Function: <em>int</em> <strong>gsl_spline_eval_integ_e</strong> <em>(const gsl_spline * <var>spline</var>, double <var>a</var>, double <var>b</var>, gsl_interp_accel * <var>acc</var>, double * <var>result</var>)</em></dt>
</dl>




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