External Email - Use Caution
Hello, I'm analyzing retinotopy data. I used expanding ring and rotating wedge. For my pilot, unfortunately, we used only 2 cycles for each stimulus and 1 cycle lasted 200 seconds (for sure I will change to more cycles lasting less). TR = 2.5.
Retinotopy paradigm files are as follow: -for expanding ring (pos direction since it expands): stimtype eccen direction pos -for rotating wedge (neg direction since is counter-clockwise): stimtype polar direction neg
To compute analyses, I ran the following pipeline: 1) recon-all 2) preproc-sess 3) mkanalysis-sess 4) selxavg3-sess Having only two cycles for each stimulus, in mkanalysis-sess, I used the option -hpf and lowered the filter to 0.5.
In the last level (selxavg3-sess), I get the error. Basically this step runs up to when MATLAB starts to calculate. Here I get the following error:
MATLAB is selecting SOFTWARE OPENGL rendering.
< M A T L A B (R) > Copyright 1984-2019 The MathWorks, Inc. R2019b Update 3 (9.7.0.1261785) 64-bit (glnxa64) November 27, 2019To get started, type doc. For product information, visit www.mathworks.com.
> >> /usr/local/freesurfer/fsfast/toolbox/fast_selxavg3.m
/usr/local/freesurfer/fsfast/toolbox/fast_ldanaflac.m /usr/local/freesurfer/matlab/MRIread.m
> starting fast_selxavg3b
#@# SUBJ02 ############################### /media/sf_w_Desktop/w_pRF/retinotopy/SUBJ02
$Id: fast_selxavg3b.m,v 1.4 2016/05/04 22:16:47 greve Exp $
outtop = /media/sf_w_Desktop/w_pRF/retinotopy Extension format = nii.gz INFO: key nSliceGroups unrecognized, line 11, skipping nruns = 2 autostimdur =
outanadir = /media/sf_w_Desktop/w_pRF/retinotopy/SUBJ02/bold/retinotopy.lh Found 118266/125623 (94.1) voxels in mask 1 Creating Design Matrix ... creation time = 0.008 sec DoMCFit = 1 ntptot = 260, nX = 158, DOF = 102 Saving X matrix to /media/sf_w_Desktop/w_pRF/retinotopy/SUBJ02/bold/retinotopy.lh/Xtmp.mat XCond = 6.85663e+16 (normalized) ERROR: design is ill-conditioned ans = 1
ERROR: fast_selxavg3() failed\n
I'm stuck with analyses and I cannot proceed further. Could you provide some insight on what to do? Having only two long lasting cycles, do I have to use further optional flags in my commands? Thank you for your time, Marco