> and <code>block1</code> (the
latter for the transposed output); you can pass
<code>FFTW_MPI_DEFAULT_BLOCK</code> to use FFTW&rsquo;s default block size as in
the basic interface.  Second, you can pass a <code>howmany</code> parameter,
corresponding to the advanced planning interface below: this is for
transforms of contiguous <code>howmany</code>-tuples of numbers
(<code>howmany = 1</code> in the basic interface).
</p>
<p>The corresponding basic and advanced routines for one-dimensional
transforms (curren