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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squier
November 09, 2017 02:51AM
Hello,

I'm trying to learn to preprocess fMRI data with AFNI.

I'm at 'outcount' stage, and have a question about deciding the order of Legendre polynomial for the option, -polort in 3dToutcount function.

I've heard that the order of polynomial varies according to the total length of time series of fMRI data and that it can be calculated through an equation.

But I can't find the equation in internet and I wonder how I can give the order to AFNI.

Could you let me know how to decide the most appropriate order of Legendre polynomial when I use 3dToutcount? Is there an equation which helps to get the polynomial order?

Thanks!
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Subject Author Posted

polynomial order for 3dToutcount

squier November 09, 2017 02:51AM

Re: polynomial order for 3dToutcount

rick reynolds November 09, 2017 08:50AM

Re: polynomial order for 3dToutcount

squier November 10, 2017 03:00AM

Re: polynomial order for 3dToutcount

rick reynolds November 11, 2017 10:55AM

Re: polynomial order for 3dToutcount

squier November 13, 2017 12:47AM

Re: polynomial order for 3dToutcount

rick reynolds November 15, 2017 09:34AM

Re: polynomial order for 3dToutcount

squier November 16, 2017 02:54AM