On Wed, 19 Jan 2022 at 03:44, Patrick Dupre <pdupre@gmx.com> wrote:
Yes, exactly.
Actually the package FFTConvolution call fftconv2 (https://github.com/jeremyfix/FFTConvolution)
 
In convolution_benchmark.cc
feval ("fftconv2", functionArguments, 1);
 
but, I get
error: feval: function 'fftconv2' not found
 
I do not know how to call the octave function from a c++ program.
It is because a library si not linked?

The convolution_benchmark.cc was last updated in 2013.  Octave has changed a lot
since then.  

 
 
 
The author of the package (jeremy.fix) did not answer to my request.

Can't really blame someone for not keeping on top of old projects.   Wonder if someone
has forked the code.  

  
Sent: Tuesday, January 18, 2022 at 9:33 PM
From: "George N. White III" <gnwiii@gmail.com>
To: "Community support for Fedora users" <users@lists.fedoraproject.org>
Subject: Re: fttconv2
On Mon, 17 Jan 2022 at 17:59, Patrick Dupre <pdupre@gmx.com> wrote:
Hello,

I get the following error:

error: feval: function 'fftconv2' not found

octave-image provide fftconv2.m

can I use it? If yes, How?
 
Are you trying to use octave's fftconv2 function?  In Fedora35 with octave and octave-image installed using dnf:
 
octave:8> pkg load image
pkg load image
octave:9> help fftconv2
help fftconv2
'fftconv2' is a function from the file /usr/share/octave/packages/image-2.12.0/fftconv2.m
 
 -- Function File: fftconv2 (A, B)
 -- Function File: fftconv2 (V1, V2, A)
 -- Function File: fftconv2 (..., SHAPE)
     Convolve 2 dimensional signals using the FFT.
 
     This method is faster but less accurate than CONV2 for large A and
     B.  It also uses more memory.  A small complex component will be
     introduced even if both A and B are real.
 
     See also: conv2, fftconv, fft, ifft.
 
 
 
--
George N. White III
 
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