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

History of AFNI updates  

Previous Message Next Message
Message List New Topic Print View
|
bob cox
April 07, 2009 07:48PM
The default polort level in 'Compute FIM' is 1, meaning a constant and linear trend are both used as baseline regressors. These are regressed out at the same time as the beta coefficient for the ideal regressor is computed -- there is none of this "detrend first and regress later" stuff in AFNI.

Thus, to duplicate the calculations exactly, you'd have to provide 3 regressors to THD_fitter, one being a constant, the second varying linearly in time, and the third being your ideal function.

By the way, you CAN set other baseline regressors ('orts') and the polort level in the interactive 'Compute FIM' with the 'Edit Ideal' sub-menu.
Reply Quote
RSS
Subject Author Posted

coeff's with THD_pearson_corr()?

Prantik Kundu April 04, 2009 10:11AM

Re: coeff's with THD_pearson_corr()?

Bob Cox April 04, 2009 11:19AM

Re: coeff's with THD_pearson_corr()?

Prantik Kundu April 05, 2009 11:30PM

Re: coeff's with THD_pearson_corr()?

Prantik April 07, 2009 04:03PM

Re: coeff's with THD_pearson_corr()?

Bob Cox April 07, 2009 05:06PM

Re: coeff's with THD_pearson_corr()?

Prantik April 07, 2009 06:37PM

Re: coeff's with THD_pearson_corr()?

bob cox April 07, 2009 07:48PM

Re: coeff's with THD_pearson_corr()?

Bob Cox April 06, 2009 11:30AM

Re: coeff's with THD_pearson_corr()?

Prantik April 06, 2009 11:51AM