AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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ptaylor
January 04, 2013 03:30AM
Well, by looking at it, I would venture a guess that it is an 'ideal filter', meaning that it has a binary modulation transfer function (equal to 1 in the bandpass region and 0 outside of it). That is, frequencies in the bandpass range [fbot, ftop] go through the filter with full amplitude, and any unfortunate souls not in that interval get squashed to zero. (Though, I think at a minimum, the zero/baseline frequency and the Nyquist are always filtered out.)

*BUT* I am happy to be corrected by one of the AFNI gurus, if there is something more subtle like a taper I'm neglecting...

--pt
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Subject Author Posted

3dBandpass filter's "name"

Anonymous User January 03, 2013 03:01PM

Re: 3dBandpass filter's "name"

ptaylor January 04, 2013 03:30AM

Re: 3dBandpass filter's "name"

Bob Cox January 09, 2013 07:20AM

Re: 3dBandpass filter's "name"

JoJo January 10, 2013 11:55AM

Re: 3dBandpass filter's "name"

jdviviano April 02, 2013 12:58AM

Re: 3dBandpass filter's "name"

ziad April 15, 2013 12:14PM