[manual] fftw unclear to me

[David Bateman]

Francesco Potorti` wrote:
>> I propose the attached changeset. Does it address your concerns?
>>     
>
> It does, thank you.  However, suppose I am a person who is ignorant of
> what libraries are precisely, and read this:
>
>   
>> When the FFTW libraries are initialized, they read a system wide
>> wisdom file (typically in /etc/fftw/wisdom), allowing wisdom to be
>> shared between applications other than Octave.
>>     
>
> Then I could ask myself: what are the FFTW libaries, and what should I
> do to initialize them?
>   
If you don't understand what a library is, you shouldn't be using fftw 
as it can do you more harm than good in the wrong hands..

> Also, towards the end, one could add something like the following, as an
> alternative to saving and restoring one's own wisdom:
>
>  Wisdom strings generated by Octave can also be appended to the system
>  wide wisdom file; this way, applications using FFTW, including Octave,
>  will read them at startup.
>   

I'm not sure of the process of appending a string from Octave to the 
system-wide wisdom file. Frankly, if you want to do this you are better 
off using the tool "fftw_wisdom" supplied with FFTW itself to manipulate 
this file. I'd therefore rather not document this.

Regards
David

-- 
David Bateman                                David.Bateman at motorola.com
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