Re: how to use fft in c++

[Pantxo]

Kire Pudsje wrote
> On Fri, Jun 9, 2017 at 8:19 PM, Progressive <

> Progressive@

> > wrote:
> 
>> At first thank you!
>>
>> What do you mean by "DEFUN is defining a function"?
>>
>> Do I have to replace   DEFUN_DLD(testfft, args, nargout, "\testfft\n ")
>>  to
>> something like   fft(testfft, args, nargout, "\testfft\n ")    ?
>>
>> I want to call octave from a cpp-file. Matrices and so on work fine but
>> calling funtctions does not. Now I'm confused anyway..  DEFUN is not a
>> function I can call?
>>
>>
> DEFUN_DLD is a macro that takes care of all the stuff to be able to call a
> function from octave. You can just use it to define a function and it will
> do all the necessary stuff without needing to think about it.
> However as you just need to call it from C++ and not from octave, you do
> not need all the extras.
> The example that has been given before, that I think is confusing you
> (sorry I am too lazy to look up the reference to the mail), was to show
> that when fft is called from octave and Ffft is called from C, they both
> give the same results. To check this (and this is the part that confuses
> you, I think), he needed to call this C function from octave, to get the
> results and compare them.
> 
> _______________________________________________
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> Help-octave@

> https://lists.gnu.org/mailman/listinfo/help-octave

Agreed, sorry about this confusing example.

Pantxo




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