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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Cesar Caballero Gaudes
October 04, 2017 04:42AM
Hello,

The answer depends on the type of data/variable you want to input to MVPA and LibSVM. If you want to input the effect size (i.e. the betas) for each stimuli, you can compute them with 3dDeconvolve using --stim_times_IM. It might be a good idea to run 3dREMLfit to account for serial correlations. However, if the trials were highly correlated (e.g. in a fast event-related design), the program 3dLSS might be a better option as shown in the paper that described this approach.

[dx.doi.org]

You can also have a look at 3dSVM for the implementation of the support vector machines in AFNI.

Best,
Cesar
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Subject Author Posted

How to do mvpa with afni?

Mpark October 03, 2017 05:03PM

Re: How to do mvpa with afni?

Cesar Caballero Gaudes October 04, 2017 04:42AM

Re: How to do mvpa with afni?

Mpark October 04, 2017 07:50PM

Re: How to do mvpa with afni?

nick October 09, 2017 01:59AM