place transform).
<span id="index-in_002dplace-5"></span>
These arrays are overwritten during planning, unless
<code>FFTW_ESTIMATE</code> is used in the flags.  (The arrays need not be
initialized, but they must be allocated.)

</li><li> <code>kind</code>, or <code>kind0</code>/<code>kind1</code>/<code>kind2</code>, or
<code>kind[rank]</code>, is the kind of r2r transform used for the
corresponding dimension.  The valid kind constants are described in
<a href="Real_002dto_002dReal-Transform-Kinds.html">Real