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

History of AFNI updates  

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June 19, 2017 06:07PM
I want to remove null (inactive) voxels from my analysis. I have an ROI mask. I want to restrict my analysis to the top 70% of active voxels within the mask. I have figured out how to use 3dBrickStat to get the numerical value of the 70th percentile of my data. However, I am stuck on how to mask by that. It looks like 3dmerge allows you to use a mask but not to specify a value (mrange) within that mask...

If there is a more efficient/straightforward way to accomplish this, that would be fine too.
Subject Author Posted

restricting analysis to most active voxels

mmontchal June 19, 2017 06:07PM

Re: restricting analysis to most active voxels

ptaylor June 19, 2017 11:33PM

Re: restricting analysis to most active voxels

mmontchal June 20, 2017 01:24PM

Re: restricting analysis to most active voxels

ptaylor June 20, 2017 01:33PM

Re: restricting analysis to most active voxels

mmontchal June 20, 2017 02:22PM

Re: restricting analysis to most active voxels

Daniel Glen June 20, 2017 01:35PM