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
January 23, 2021 05:53PM
Profile-tracking analysis (PTA) estimates nonlinear trajectories, trends or profiles through smoothing splines. Currently the program PTA only works through a command-line scripting mode. It shares the same modeling mechanism as the program 3dMSS. The differences are: 1) 3dMSS is usually used for 3D or 1D data (e.g., surface data in .niml.dset, 20 or more ROIs) while PTA is designed for ROI (less than 20) or behavior data at the subject or population level; 2) the output from PTA can be easily used for customized demonstration of estimated trajectories (with uncertainty bands).

The usage and examples can be found in the help of the program:

PTA -help | less

The underlying theory is covered in the following paper:

Chen et al. (2020). Beyond linearity: Capturing nonlinear relationships in neuroimaging. [doi.org]

Gang



Edited 3 time(s). Last edit at 01/25/2021 07:37AM by Gang.
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New program PTA: tracking nonlinear trajectories with 1D data

gang January 23, 2021 05:53PM