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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jlisinski
November 27, 2017 10:32AM
Hi Nan,

3dsvm was originally developed for classification of temporal and minimally pre-processed FMRI data. Thus, temporal de-trending of the classifier output is performed by default to correct for temporal drift that we observed. Please take a look at LaConte, 2007 (Fig. 4) for more details. However, performing de-trending of the classifier output is not the only and might not be the best way to correct for drift of the FMRI signal/classifier output, so you need to decide if it's necessary.

If you are NOT using temporal FMRI data (e.g. GLM beta maps, functional connectivity maps, structural data, etc.), please use the -nodetrend option to disable temporal de-trending.

Jonathan
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Subject Author Posted

about 3dsvm: any setting to prohibit the model output?

Nan October 27, 2017 01:07AM

Re: about 3dsvm: any setting to prohibit the model output?

jlisinski October 31, 2017 03:09PM

Re: about 3dsvm: any setting to prohibit the model output?

Nan November 06, 2017 11:14PM

Re: about 3dsvm: any setting to prohibit the model output?

jlisinski November 14, 2017 10:20AM

Re: about 3dsvm: any setting to prohibit the model output?

jlisinski November 21, 2017 12:43PM

Re: about 3dsvm: any setting to prohibit the model output?

Nan November 23, 2017 04:54AM

Re: about 3dsvm: any setting to prohibit the model output?

Nan November 23, 2017 07:41AM

Re: about 3dsvm: any setting to prohibit the model output?

jlisinski November 27, 2017 10:32AM

Re: about 3dsvm: any setting to prohibit the model output?

Nan November 24, 2017 04:08AM

Re: about 3dsvm: any setting to prohibit the model output?

jlisinski November 27, 2017 11:02AM