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Re: question relating to FFT [message #65461 is a reply to message #65371]

Tue, 03 March 2009 08:14

pgrigis
Messages: 436
Registered: September 2007

Senior Member

David Fanning wrote:
> Paolo writes:
>
>> Try plot,dist(152)
>> Does that look like what you want?
>
> It could be. Using the DIST function is one of the ways
> you could construct a low-pass or high-pass filter for
> digital images:
>
> http://www.dfanning.com/ip_tips/freqfiltering.html

Yes, but the OP was speaking of a "curve" with 152 elements,
that is a one dimensional array. But dist(152) is a 152x152
array, and I don't think mixing 1-dim and 2-dim arrays like
that is the right way to go ;-)
It would be a bit easier to understand what is going on by
just building the 1-dim filter explicitely...

Ciao,
Paolo

>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Coyote's Guide to IDL Programming (www.dfanning.com)
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: question relating to FFT By: David Fanning on Mon, 02 March 2009 15:30
		Re: question relating to FFT By: pgrigis on Mon, 02 March 2009 15:21
		Re: question relating to FFT By: Hu on Mon, 02 March 2009 14:03
		Re: question relating to FFT By: pgrigis on Mon, 02 March 2009 11:37
		Re: question relating to FFT By: pgrigis on Tue, 03 March 2009 08:14

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