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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Vince Hradil
January 15, 2004 01:44PM
Last year there was a question regarding converting AFNI sets to ANALYZE shorts for use with AIR.

[afni.nimh.nih.gov]

Rick suggested using 3dcalc with the -nscale, with the caveat: "you are not worried about truncation errors, and the maximum values in the dataset do not exceed the maximum values for the integer types"

With this in mind, does it make sense to run 3dcalc first with the -gscale the run 3dcalc on the resulting dataset with the -nscale? Does this insure that the data will be in the right range?

ex:
3dcalc -datum short -gscale -a fmri+orig -expr a -prefix fmri_gshort
3dcalc -datum short -nscale -a fmri_gshort+orig -expr a -prefix fmri_short
3dAFNItoANALYZE -4D fmri_short fmri_short+orig

The results "look" okay so far, but am I missing something?
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Subject Author Posted

Re: 3dAFNItoANALYZE data type

Vince Hradil January 15, 2004 01:44PM

Re: 3dAFNItoANALYZE data type

rick reynolds January 15, 2004 03:33PM

Re: 3dAFNItoANALYZE data type

Vince Hradil January 19, 2004 10:26AM