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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January 11, 2005 02:35PM
Hi Greg,

Your datasets have identical grids, which is good. But you
cut off the [scaled] line from Patterns_act1+tlrc, so I cannot
see what the real data range is there.

My guess is that you do not want to use simple step functions
like 'step(a)', but you would rather threshold the values. For
example, suppose you only care about values above 0.6 in
Patterns_act1+tlrc, and above 0.5 in ROI_allHipp_R+tlrc.
Then you might use a step computation like:

-expr 'step(a-0.5)+2*step(b-0.6)'

- rick

Subject Author Posted

3dmaskave and 3dcalc

Greg Harrington January 10, 2005 06:53PM

Re: 3dmaskave and 3dcalc

rick reynolds January 11, 2005 12:26PM

Re: 3dmaskave and 3dcalc

Greg Harrington January 11, 2005 01:38PM

Re: 3dmaskave and 3dcalc

rick reynolds January 11, 2005 02:35PM

Re: 3dmaskave and 3dcalc

Greg Harrington January 11, 2005 03:45PM

Re: 3dmaskave and 3dcalc

rick reynolds January 11, 2005 03:59PM