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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gang
September 17, 2014 11:03AM
Gustavo,

In your case 3dRegAna and 3dttest++ should render the same results if you specify the same model. With 3dttest++, you put all the three quantitative variables as three columns in a text file, and then use option -covariates in 3dttest++. You may also consider proper centering if the intercept is of interest. Check out the help of 3dttest++ for more details:

3dttest++ | less

or,

3dttest++ -h_view

A side note: You may label each variable the way you like (e.g., predictor vs. covariate), but all the variables are treated the same in the model regardless each of them is of interest to the investigator.

Gang



Edited 1 time(s). Last edit at 09/17/2014 03:27PM by Gang.
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Subject Author Posted

3dRegAna and 3dttest++

gsudre September 16, 2014 05:30PM

Re: 3dRegAna and 3dttest++

gang September 17, 2014 11:03AM