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.
As suggested by various Toms, 3dmerge or 3dMean are better for averaging -- faster by far. There is at this time no way to input more than 26 values into 3dcalc. I have yet to see a good application for this, since the most common suggestions (averaging and other simple statistics) have specialized programs for just these purposes.