4.4.3 Advanced Real-to-real Transforms

fftw_plan fftw_plan_many_r2r(int rank, const int *n, int howmany,
                             double *in, const int *inembed,
                             int istride, int idist,
                             double *out, const int *onembed,
                             int ostride, int odist,
                             const fftw_r2r_kind *kind, unsigned flags);

Like fftw_plan_many_dft, this functions adds howmany, nembed, stride, and dist parameters to the fftw_plan_r2r function, but otherwise behave the same as the basic interface. The interpretation of those additional parameters are the same as for fftw_plan_many_dft. (Of course, the stride and dist parameters are now in units of double, not fftw_complex.)

Arrays n, inembed, onembed, and kind are not used after this function returns. You can safely free or reuse them.

This document was generated on March 17, 2014 using texi2html 5.0.