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<a name="Creating-ntuples"></a>
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<p>
Next: <a href="Opening-an-existing-ntuple-file.html#Opening-an-existing-ntuple-file" accesskey="n" rel="next">Opening an existing ntuple file</a>, Previous: <a href="The-ntuple-struct.html#The-ntuple-struct" accesskey="p" rel="previous">The ntuple struct</a>, Up: <a href="N_002dtuples.html#N_002dtuples" accesskey="u" rel="up">N-tuples</a> &nbsp; [<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Creating-ntuples-1"></a>
<h3 class="section">24.2 Creating ntuples</h3>

<dl>
<dt><a name="index-gsl_005fntuple_005fcreate"></a>Function: <em>gsl_ntuple *</em> <strong>gsl_ntuple_create</strong> <em>(char * <var>filename</var>, void * <var>ntuple_data</var>, size_t <var>size</var>)</em></dt>
<dd><p>This function creates a new write-only ntuple file <var>filename</var> for
ntuples of size <var>size</var> and returns a pointer to the newly created
ntuple struct.  Any existing file with the same name is truncated to
zero length and overwritten.  A pointer to memory for the current ntuple
row <var>ntuple_data</var> must be supplied&mdash;this is used to copy ntuples
in and out of the file.
</p></dd></dl>




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