>
(see <a href="One_002dDimensional-DFTs-of-Real-Data.html#One_002dDimensional-DFTs-of-Real-Data">One-Dimensional DFTs of Real Data</a>) but with &ldquo;halfcomplex&rdquo;
format output, and may sometimes be faster and/or more convenient than
the latter.
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The inverse <em>hc2r</em> transform is of kind <code>FFTW_HC2R</code>.
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This consists of the non-redundant half of the complex output for a 1d
real-input D