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

History of AFNI updates  

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September 01, 2015 04:10PM
I'm confused about an error I'm receiving from 3dNLfim. I have a small dataset with 5 time points. I'm running 3dNLfim to fit these points to an exponential function, and I'm using the -time option to specify the times when each sample was acquired. The 1D file used as the -time input contains 5 values. But when I run 3dNLfim, I get an error saying "Time reference array is too short".

Here are the commands I run:
echo "15.4, 29.7, 44.0, 58.3, 72.6" > "sampleTimes.1D"
3dNLfim \
	-input "TEMP+orig" \
	-mask "SBJ01_FullBrain_EPIRes+orig.BRIK" \
	-ignore 0 \
	-noise Zero \
	-signal Exp \
	-nrand 100 \
	-nbest 5 \
	-fdisp 100.0 \
	-bucket 0 "TEMP.bucket" \
	-time "sampleTimes.1D"

Here is the output I see:
++ 3dNLfim: AFNI version=AFNI_2011_12_21_1014 (Oct 23 2014) [64-bit]
++ Authored by: B. Douglas Ward
++ NOTICE: Default value of -ignore is now 0;
           Before 04 Nov 2008, default value was 3
++ time series length = 5 points
++ 28247 voxels in mask SBJ01_FullBrain_EPIRes+orig.BRIK
3dNLfim Error: Time reference array is too short 
Subject Author Posted

3dNLfim time reference array error

djangraw September 01, 2015 04:10PM

Re: 3dNLfim time reference array error

jkeidel September 02, 2015 06:56AM

Re: 3dNLfim time reference array error

djangraw September 02, 2015 10:28AM