Mercurial > octave-nkf
changeset 8426:7523742aa026
Add explanation on what wisdom is.
| author | Francesco Potortì <pot@gnu.org> |
|---|---|
| date | Fri, 26 Dec 2008 20:33:52 +0100 |
| parents | 2e777f5135a3 |
| children | 26b899d309f6 |
| files | doc/ChangeLog doc/interpreter/signal.txi |
| diffstat | 2 files changed, 17 insertions(+), 0 deletions(-) [+] |
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--- a/doc/ChangeLog Thu Dec 25 12:31:07 2008 +0100 +++ b/doc/ChangeLog Fri Dec 26 20:33:52 2008 +0100 @@ -1,3 +1,8 @@ +2008-12-26 Francesco Potortì <pot@gnu.org> + + * interpreter/signal.txi (Signal Processing): Add explanation of + what wisdom is. + 2008-12-23 David Bateman <dbateman@free.fr> * interpreter/sparse.txi: Document the eigs and svds functions.
--- a/doc/interpreter/signal.txi Thu Dec 25 12:31:07 2008 +0100 +++ b/doc/interpreter/signal.txi Fri Dec 26 20:33:52 2008 +0100 @@ -23,6 +23,18 @@ @DOCSTRING(fft) +Octave uses the FFTW libraries to perform FFT computations. When Octave +starts up and initializes the FFTW libraries, they read a system wide +file (on a Unix system, it is typically @file{/etc/fftw/wisdom}) that +contains information useful to speed up FFT computations. This +information is called the @emph{wisdom}. The system-wide file allows +wisdom to be shared between all applications using the FFTW libraries. + +Use the @code{fftw} function to generate and save wisdom. Using the +utilities provided together with the FFTW libraries +(@command{fftw-wisdom} on Unix systems), you can even add wisdom +generated by Octave to the system-wide wisdom file. + @DOCSTRING(fftw) @DOCSTRING(ifft)