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
|
rick reynolds
September 04, 2007 04:31PM
Hi Mona,

An A vs. B contrast (via adiff?) is the difference between the
average A value and the average B value. Supposing that each
average is in the range of [-5,10], then the difference between
them will be in [-15,15]. For example, consider these extreme
averages:

A = 10, B = 10, then A-B = 0, and color = green
A = 10, B = -5, then A-B = 15, color = red
A = -5, B = 10, then A-B = -15, color = blue
A = -5, B = -5, then A-B = 0, color = green

Of course, that assumes the default coloring and a scale of 15.

Does that seem reasonable?

- rick

Reply Quote
RSS
Subject Author Posted

contrasts

Mona September 04, 2007 03:27PM

Re: contrasts

rick reynolds September 04, 2007 04:31PM

Re: contrasts

Mona September 05, 2007 01:49PM

Re: contrasts

Mona September 05, 2007 02:19PM

Re: contrasts

rick reynolds September 05, 2007 02:44PM

Re: contrasts

Mona September 05, 2007 03:58PM