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
