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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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Hi Rick,
Yes, you are correct. There is just one event per class. Thank you for spelling this out for me---I slapped my head while being reminded that the difference with respect to concatenation in this specific case would be in the t-values, not the betas. This really simplifies and clarifies things, I appreciate it.
And thank you for the run-down on the registration issues. The 3a approa
by
ChrisCox
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AFNI Message Board
Ha! Thanks for the comic at the end, that got a real laugh.
This is very helpful, thank you. I am comfortable with those scripting options, and I may also have access to larger computers without needing to wait to long, so my next steps will be contingent on those logistics I think. It's very helpful to know how about the memory-mapping efficiency with uncompressed BRIK/HEAD.
Thank you
by
ChrisCox
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AFNI Message Board
I am glad for the perspective that separate residuals in this case would probably be fine. The plan is to do representational similarity analysis following on from a behavioral study looking at an interesting subset of ~700 images from the full set. So deriving one "representation" per image is the goal.
I would have been comfortable modeling each session separately if each session c
by
ChrisCox
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AFNI Message Board
I am exploring the BOLD5000 dataset (Chang et al., 2019; link to webpage; link to paper). I am considering how to model it to get a beta map for each stimulus, which would be the input for further analysis.
The dataset has four participants who each participated in a slow event related design over ~16 sessions of ~10 runs each. Over this time, they viewed ~5000 distinct images. If it were conc
by
ChrisCox
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AFNI Message Board
Hello!
I have been trying to use 3drotate with the -points option to manually transform coordinates according to the output from something like:
➜ T1 cat_matvec 02mnd_anat_train_al+tlrc.HEAD::WARP_DATA
1.0303 0 0 1.44881
0 1.03285 -0.157387 6.64028
0 0.14477 0.950072 5.
by
ChrisCox
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AFNI Message Board