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  

|
September 05, 2007 02:44PM
Hi Mona,

Your -acontr options are idential to using -adiff. For
instance, the first contrast:

-acontr 1 -1 0 0 cf7_tp_vs_fn

would be identical to:

-adiff 1 2 cf7_tp_vs_fn

Note that '-acontr 1 -1 0 0' means 1*A1 + -1*A2 + 0 + 0,
which is equal to A1-A2. Also, your last contrast:

-acontr 0 0 -1 1 cf7_fp_vs_fn

would be intentical to:

-adiff 4 3

Note that the order is important. Here, '-adiff 4 3'
means factor level 4 minus factor level 3.

- rick

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