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<h3 class="section">20.8 Maximum and Minimum values</h3>
<p>The following functions find the maximum and minimum values of a
dataset (or their indices). If the data contains <code>NaN</code>s then a
<code>NaN</code> will be returned, since the maximum or minimum value is
undefined. For functions which return an index, the location of the
first <code>NaN</code> in the array is returned.
<div class="defun">
— Function: double <b>gsl_stats_max</b> (<var>const double data</var>[]<var>, size_t stride, size_t n</var>)<var><a name="index-gsl_005fstats_005fmax-1851"></a></var><br>
<blockquote><p>This function returns the maximum value in <var>data</var>, a dataset of
length <var>n</var> with stride <var>stride</var>. The maximum value is defined
as the value of the element x_i which satisfies <!-- {$x_i \ge x_j$} -->
x_i >= x_j for all j.
<p>If you want instead to find the element with the largest absolute
magnitude you will need to apply <code>fabs</code> or <code>abs</code> to your data
before calling this function.
</p></blockquote></div>
<div class="defun">
— Function: double <b>gsl_stats_min</b> (<var>const double data</var>[]<var>, size_t stride, size_t n</var>)<var><a name="index-gsl_005fstats_005fmin-1852"></a></var><br>
<blockquote><p>This function returns the minimum value in <var>data</var>, a dataset of
length <var>n</var> with stride <var>stride</var>. The minimum value is defined
as the value of the element x_i which satisfies <!-- {$x_i \le x_j$} -->
x_i <= x_j for all j.
<p>If you want instead to find the element with the smallest absolute
magnitude you will need to apply <code>fabs</code> or <code>abs</code> to your data
before calling this function.
</p></blockquote></div>
<div class="defun">
— Function: void <b>gsl_stats_minmax</b> (<var>double * min, double * max, const double data</var>[]<var>, size_t stride, size_t n</var>)<var><a name="index-gsl_005fstats_005fminmax-1853"></a></var><br>
<blockquote><p>This function finds both the minimum and maximum values <var>min</var>,
<var>max</var> in <var>data</var> in a single pass.
</p></blockquote></div>
<div class="defun">
— Function: size_t <b>gsl_stats_max_index</b> (<var>const double data</var>[]<var>, size_t stride, size_t n</var>)<var><a name="index-gsl_005fstats_005fmax_005findex-1854"></a></var><br>
<blockquote><p>This function returns the index of the maximum value in <var>data</var>, a
dataset of length <var>n</var> with stride <var>stride</var>. The maximum value is
defined as the value of the element x_i which satisfies
<!-- {$x_i \ge x_j$} -->
x_i >= x_j for all j. When there are several equal maximum
elements then the first one is chosen.
</p></blockquote></div>
<div class="defun">
— Function: size_t <b>gsl_stats_min_index</b> (<var>const double data</var>[]<var>, size_t stride, size_t n</var>)<var><a name="index-gsl_005fstats_005fmin_005findex-1855"></a></var><br>
<blockquote><p>This function returns the index of the minimum value in <var>data</var>, a
dataset of length <var>n</var> with stride <var>stride</var>. The minimum value
is defined as the value of the element x_i which satisfies
<!-- {$x_i \ge x_j$} -->
x_i >= x_j for all j. When there are several equal
minimum elements then the first one is chosen.
</p></blockquote></div>
<div class="defun">
— Function: void <b>gsl_stats_minmax_index</b> (<var>size_t * min_index, size_t * max_index, const double data</var>[]<var>, size_t stride, size_t n</var>)<var><a name="index-gsl_005fstats_005fminmax_005findex-1856"></a></var><br>
<blockquote><p>This function returns the indexes <var>min_index</var>, <var>max_index</var> of
the minimum and maximum values in <var>data</var> in a single pass.
</p></blockquote></div>
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