Matlab incompatibility bug in ifft

[Ben Abbott]

On Monday, February 25, 2008, at 01:23PM, "Ryan Hinton" <iobass at email.com> wrote:
>
>Matlab supports an extra argument to the ifft command to force Hermitian 
>symmetry in the argument and so produce a real output.  This should make 
>the IFFT calculation faster and save an abs() call at the end.  (I am 
>implementing fast convolution of real signals, so I know the result must 
>be real also.)
>
>Octave example:
>ret = abs(ifft([1 + eps*1j;1 + eps*1j], [], 1));
>
>Matlab-supported shortcut:
>ret = ifft([1 + eps*1j;1 + eps*1j], [], 1, 'symmetric');
>
>This seems like a simple fix/enhancement, but I got lost in the code.  I 
>am happy to provide more information.  Or I can try a fix if someone can 
>help me figure out generally what needs to be done to which files.  I'm 
>familiar with m-code, but not with all the conventions and internal data 
>types of Octave's implementation.
>
>Thanks!
>

I believe what is needed is "real" not "abs".

Ben