Re: Real-data DFT in Octave

[Sergei Steshenko]

----- Original Message -----
> From: Torbjörn Rathsman <address@hidden>
> To: Sergei Steshenko <address@hidden>; "address@hidden" <address@hidden>
> Cc: 
> Sent: Saturday, October 6, 2012 9:05 PM
> Subject: Re: Real-data DFT in Octave
> 
[snip]
> I am trying to apply a filter that is k*k for k<1024 which is somewhat 
> equivalent to diffrentiate the input twice for low frequencies.
[snip]

FWIW, since in Octave indices start from 1 and not from zero, the filter should 
be (k - 1) ^ 2.

Regards,
  Sergei.