Dear FS experts

 

I am trying to run the commands for performing the longitudinal mixed effect statistics with the LME Matlab toolbox.

I am following the instructions on the web page; however, I have two questions:

 

1) when I run the command lme_mass_fit_vw, the script is running for a very long time, after 3 hours the estimation was just at 10% (unfortunately, my laptop is equipped with Windows and is not particularly powerful). I had to stop the script at that point; before restarting it again I would like to be sure: is this behavior normal?  Is it correct that lme_mass_fit_vw is running for such a long time?

 

2) when the script was running, there were several warnings on the Matlab screen, saying that the algorithm was not converging (at most of locations). Is it also normal? How can I check the correctness of my input image? When I open with freeview the “lh.thickness_sm10.mgh” volume, I just see a black screen with valid timeseries values in the minority of voxels (I imagine that these timeseries are concatenated thickness values of my study subjects). Is there another way to better visualize and check a concatenated 4d mgh file? Failure of convergence is referring to empty/zero voxels of this image?

 

Thank you for any advice on these two topics

Kind regards

Paola