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

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bob cox
December 11, 2003 10:27AM
It is almost certainly the case that the EP dataset is byte-swapped relative to the order on your CPU. This fact is recorded in the AFNI header, so that AFNI will silently fix the data as it reads from disk. Matlab does not do this. You can check by looking at the top lines of the 3dinfo output, which will include a line like so:
Byte Order: LSB_FIRST [this CPU native = MSB_FIRST]
In this example, you can see that the dataset is stored on disk in a byte-reversed way relative to the current CPU. Rick Reynolds described how to fix this (2swap and 3drefit).

#18 in the FAQ list has a little more about this subject.

bobcox
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Subject Author Posted

AFNI format and scaling

Emmette December 10, 2003 04:14PM

Re: AFNI format and scaling

rick reynolds December 10, 2003 04:46PM

Re: AFNI format and scaling

bob cox December 11, 2003 10:27AM