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cannam@127: <title>FFTW 3.3.5: Advanced Real-to-real Transforms</title>
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cannam@127: Previous: <a href="Advanced-Real_002ddata-DFTs.html#Advanced-Real_002ddata-DFTs" accesskey="p" rel="prev">Advanced Real-data DFTs</a>, Up: <a href="Advanced-Interface.html#Advanced-Interface" accesskey="u" rel="up">Advanced Interface</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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cannam@127: <a name="Advanced-Real_002dto_002dreal-Transforms-1"></a>
cannam@127: <h4 class="subsection">4.4.3 Advanced Real-to-real Transforms</h4>
cannam@127:
cannam@127: <div class="example">
cannam@127: <pre class="example">fftw_plan fftw_plan_many_r2r(int rank, const int *n, int howmany,
cannam@127: double *in, const int *inembed,
cannam@127: int istride, int idist,
cannam@127: double *out, const int *onembed,
cannam@127: int ostride, int odist,
cannam@127: const fftw_r2r_kind *kind, unsigned flags);
cannam@127: </pre></div>
cannam@127: <a name="index-fftw_005fplan_005fmany_005fr2r"></a>
cannam@127:
cannam@127: <p>Like <code>fftw_plan_many_dft</code>, this functions adds <code>howmany</code>,
cannam@127: <code>nembed</code>, <code>stride</code>, and <code>dist</code> parameters to the
cannam@127: <code>fftw_plan_r2r</code> function, but otherwise behave the same as the
cannam@127: basic interface. The interpretation of those additional parameters are
cannam@127: the same as for <code>fftw_plan_many_dft</code>. (Of course, the
cannam@127: <code>stride</code> and <code>dist</code> parameters are now in units of
cannam@127: <code>double</code>, not <code>fftw_complex</code>.)
cannam@127: </p>
cannam@127: <p>Arrays <code>n</code>, <code>inembed</code>, <code>onembed</code>, and <code>kind</code> are not
cannam@127: used after this function returns. You can safely free or reuse them.
cannam@127: </p>
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