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<title>Combination allocation - GNU Scientific Library -- Reference Manual</title>
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<a name="Combination-allocation"></a>
Next:&nbsp;<a rel="next" accesskey="n" href="Accessing-combination-elements.html">Accessing combination elements</a>,
Previous:&nbsp;<a rel="previous" accesskey="p" href="The-Combination-struct.html">The Combination struct</a>,
Up:&nbsp;<a rel="up" accesskey="u" href="Combinations.html">Combinations</a>
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<h3 class="section">10.2 Combination allocation</h3>

<div class="defun">
&mdash; Function: gsl_combination * <b>gsl_combination_alloc</b> (<var>size_t n, size_t k</var>)<var><a name="index-gsl_005fcombination_005falloc-1030"></a></var><br>
<blockquote><p>This function allocates memory for a new combination with parameters
<var>n</var>, <var>k</var>.  The combination is not initialized and its elements
are undefined.  Use the function <code>gsl_combination_calloc</code> if you
want to create a combination which is initialized to the
lexicographically first combination. A null pointer is returned if
insufficient memory is available to create the combination. 
</p></blockquote></div>

<div class="defun">
&mdash; Function: gsl_combination * <b>gsl_combination_calloc</b> (<var>size_t n, size_t k</var>)<var><a name="index-gsl_005fcombination_005fcalloc-1031"></a></var><br>
<blockquote><p>This function allocates memory for a new combination with parameters
<var>n</var>, <var>k</var> and initializes it to the lexicographically first
combination. A null pointer is returned if insufficient memory is
available to create the combination. 
</p></blockquote></div>

<div class="defun">
&mdash; Function: void <b>gsl_combination_init_first</b> (<var>gsl_combination * c</var>)<var><a name="index-gsl_005fcombination_005finit_005ffirst-1032"></a></var><br>
<blockquote><p>This function initializes the combination <var>c</var> to the
lexicographically first combination, i.e.  (0,1,2,<small class="dots">...</small>,k-1). 
</p></blockquote></div>

<div class="defun">
&mdash; Function: void <b>gsl_combination_init_last</b> (<var>gsl_combination * c</var>)<var><a name="index-gsl_005fcombination_005finit_005flast-1033"></a></var><br>
<blockquote><p>This function initializes the combination <var>c</var> to the
lexicographically last combination, i.e.  (n-k,n-k+1,<small class="dots">...</small>,n-1). 
</p></blockquote></div>

<div class="defun">
&mdash; Function: void <b>gsl_combination_free</b> (<var>gsl_combination * c</var>)<var><a name="index-gsl_005fcombination_005ffree-1034"></a></var><br>
<blockquote><p>This function frees all the memory used by the combination <var>c</var>. 
</p></blockquote></div>

<div class="defun">
&mdash; Function: int <b>gsl_combination_memcpy</b> (<var>gsl_combination * dest, const gsl_combination * src</var>)<var><a name="index-gsl_005fcombination_005fmemcpy-1035"></a></var><br>
<blockquote><p>This function copies the elements of the combination <var>src</var> into the
combination <var>dest</var>.  The two combinations must have the same size. 
</p></blockquote></div>

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