Re: Problems with FFT and IFFT

[Quentin Spencer]

Joe Koski wrote:

> on 2/28/06 12:27 PM, John W. Eaton at address@hidden wrote:
>
>  
>
> > On 28-Feb-2006, Sascha Berkenkamp wrote:
> >
> > | Must I set all values smaller than eps to zeros?
> >
> > You can do that if you think it is appropriate for your application.
> > I see no way that Octave can determine whether it is reasonable to do
> > that for you.
> >
> > jwe
> >
> >    
>
> A related question:
>
> Code efficiency-wise, would it be quicker to just x2=abs(x2), rather than
> searching through eps values? The error introduced would probably be small.
> Is there a quick vector way of setting all values less than eps to zero,
> rather than searching the vector with a for loop?
>  

Something like this:

octave:1> a=1:4;
octave:2> a(a<=2)=0;
octave:3> a
a =

 0  0  3  4


-Quentin



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