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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layne
November 10, 2008 09:25PM
hello afni users:

When I was using the program of 3dDconvolve, it said as follows:

*+ WARNING: -------------------------------------------------
*+ WARNING: Problems with the X matrix columns, listed below:
*+ WARNING: !! * Columns 69 [hs#5] and 70 [hs#6] are nearly collinear!
*+ WARNING: !! * Columns 76 [hs#12] and 77 [hs#13] are nearly collinear!
*+ WARNING: !! * Columns 79 [hs#15] and 80 [hs#16] are nearly collinear!
*+ WARNING: !! * Columns 79 [hs#15] and 81 [hs#17] are nearly collinear!
*+ WARNING: !! * Columns 80 [hs#16] and 81 [hs#17] are nearly collinear!
*+ WARNING: !! * Columns 82 [hs#18] and 83 [hs#19] are nearly collinear!
*+ WARNING: -------------------------------------------------
*+ WARNING: !! in Signal+Baseline matrix:
* Largest singular value=14.4482
* 5 singular values are less than cutoff=1.44482e-06
* Implies strong collinearity in the matrix columns!
*+ WARNING: !! in Signal-only matrix:
* Largest singular value=13.5079
* 5 singular values are less than cutoff=1.35079e-06
* Implies strong collinearity in the matrix columns!
*+ WARNING: +++++ !! Matrix inverse average error = 0.00141723 ** BEWARE **
*+ WARNING: !! 3dDeconvolve -GOFORIT is set to 9: running despite 9 matrix warnings
*+ WARNING: !! See file 3dDeconvolve.err for all WARNING and ERROR messages !!
*+ WARNING: !! Please be sure you understand what you are doing !!
*+ WARNING: !! If in doubt, consult with someone or with the AFNI message board !!

when I used -GOFORIT 9 ,the program run succusefully. could this method destroy the dataset? how can I deal with this warnings above?

thanks.

layne
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Subject Author Posted

about GOFORIT

layne November 10, 2008 09:25PM

Re: about GOFORIT

bob cox November 10, 2008 09:35PM

Re: about GOFORIT

layne November 11, 2008 02:41AM