Mercurial > octave-nkf
changeset 11905:1d237a82e393 release-3-0-x
Add explanation on what wisdom is.
| author | Francesco Potortì <pot@gnu.org> |
|---|---|
| date | Mon, 12 Jan 2009 10:54:45 +0100 |
| parents | 059fadc0cbc3 |
| children | e4446f9ba0e1 |
| files | doc/ChangeLog doc/interpreter/signal.txi |
| diffstat | 2 files changed, 17 insertions(+), 0 deletions(-) [+] |
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--- a/doc/ChangeLog Mon Jan 12 10:42:03 2009 +0100 +++ b/doc/ChangeLog Mon Jan 12 10:54:45 2009 +0100 @@ -1,3 +1,8 @@ +2008-12-26 Francesco Potortì <pot@gnu.org> + + * interpreter/signal.txi (Signal Processing): Add explanation of + what wisdom is. + 2008-08-28 John W. Eaton <jwe@octave.org> * interpreter/plot.txi: Doc fixes suggested by Francesco Potorti`
--- a/doc/interpreter/signal.txi Mon Jan 12 10:42:03 2009 +0100 +++ b/doc/interpreter/signal.txi Mon Jan 12 10:54:45 2009 +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)