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[manual] Add explanation on what wisdom is.
From: |
Francesco Potortì |
Subject: |
[manual] Add explanation on what wisdom is. |
Date: |
Fri, 26 Dec 2008 20:35:52 +0100 |
This is the first of a series (if I manage to find the time) of
changesets against the latest source that replicate changesets I had
sent in the past three months but were never applied.
# HG changeset patch
# User Francesco Potortì <address@hidden>
# Date 1230320032 -3600
# Node ID 60107c9637c2e4f9c44111d60dcc7c54daedf4bf
# Parent 2e777f5135a3b9718b1622fd63a655f9a8830ecc
Add explanation on what wisdom is.
diff -r 2e777f5135a3 -r 60107c9637c2 doc/ChangeLog
--- 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 @@ 2008-12-23 David Bateman <address@hidden
+2008-12-26 Francesco Potortì <address@hidden>
+
+ * interpreter/signal.txi (Signal Processing): Add explanation of
+ what wisdom is.
+
2008-12-23 David Bateman <address@hidden>
* interpreter/sparse.txi: Document the eigs and svds functions.
diff -r 2e777f5135a3 -r 60107c9637c2 doc/interpreter/signal.txi
--- 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
@@ -22,6 +22,18 @@
@DOCSTRING(detrend)
@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)
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