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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Daniel Glen
November 17, 2009 03:56PM
I think this may be what you are trying to do:

3dcalc -a dset+orig -b weight+orig -expr 'a*b' -prefix dset_wtd
3dcalc -a dset_wtd+orig -prefix wt_mask -expr 'step(abs(a))'
3dROIstats -nzsum -mask wt_mask+orig dset_wtd+orig

This applies a weighting mask to a similar dataset at each time point and then prints the sum of each sub-brick volume at each time point. Is that what you want to do?
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Subject Author Posted

Factor Analysis on Voxels

Andrew Jahn November 17, 2009 02:00PM

Re: Factor Analysis on Voxels

Daniel Glen November 17, 2009 03:56PM

Re: Factor Analysis on Voxels

Andrew Jahn November 18, 2009 03:43PM