one wants to display multiple sessions for comparison. Here is how
to do that.
NOT start multiple instances of afni from the command line, this
quickly overburdens the machines (we can't run two sessions this
way on our sgis unless you reduce the number of colors in the second
a Few Sessions
long as you start afni in a directory that has some legitimate afni
briks in it, you should be able to hit the "new" button
on the lower left of the panel to start additional instances of
afni. You'll need one instance of afni for each same-orientation
image you want to display (e.g., two instances if I want to compare
two different axial images, but only one instance if I want to see
the same image in axial and sagittal views).
a running instance of afni, you can switch to a different directory
Sess-->A box appears with directory and file selectors. Use ..
in the directory selector to go up a directory (you may want to
stretch the box to the left so you can see the directory selector
better), or to go down through the directories, choose the directory
by clicking on it. Choose the "filter" button to refresh
your view in the directory and file selectors. Make sure that both
the "filter" and "selection" paths are correctly
specified before you hit "set". If you have successfully
selected a directory with legitimate afni files, a popup will inform
on the main afni panel, choose "Switch Session" and browse
down to your new session.
a final check that you are viewing the intended item, choose "Axial"
and note the path displayed at the top of the axial image. You may
wish to check both "Switch Function" and "Switch
Anatomy" as well.
a Ton of Sessions Automatically
to the parent directory that contains all the directories containing
your afni briks (or directories containing directories containing
afni briks etc.).
check your email, have a cup of coffee etc. When you come back,
afni will have identified all subdirectories containing files it
recognizes (including *.img files). Use "Switch Session"
and then "Switch Anatomy" and "Switch Function"
to display your files.