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  

Previous Message Next Message
Message List New Topic Print View
|
bob cox
December 09, 2004 08:15AM
In AFNI itself, you can click the "Pos" button under the colorscale in "Define Overlay". This will show only positive Overlay functional values -- so if you set the overlay brick to be the t-statistic, that's what you'll get.

In 3dcalc, you could use an expression like 'a*step(a-3)' to select out voxels that have values greater than 3.

You could do this combined with clustering as well, in 3dmerge, if you chose the correct combination of "-1" editing operations.
Reply Quote
RSS
Subject Author Posted

3dcalc +/-

dongpsy December 09, 2004 03:09AM

Re: 3dcalc +/-

bob cox December 09, 2004 08:15AM

Re: 3dcalc +/-

dongpsy December 09, 2004 11:51PM