Dear FreeSurfer Team,
I processed in MATLAB for Linear Mixed Effects Models Analysis with this X matrix:
X matrix is 'Subjects N X 11', 11 columns are as follow,
1. Intercept (all '1') 2. time (from baseline time point) 3. time2 4. Patients group = 1, Control = 0 5. 4.X time 6. 4.X time2 7. Patients group = 0, Control = 1 8. 7. X time 9. 8. X time2 10. age 11. extra values for covariate
1. When I process this command, [lhTh01,lhRe01] = lme_mass_fit_EMinit(X,[1],Y,ni,lhcortex,3,4) The MATLAB windows print the warning alarm repeatedly. " Warning: Matrix is close to singular or badly scaled. Results may be inaccurate." Is this X matrix something wrong?
2. After complete 'lme_mass_fit_EMinit' process with the warning, I tried the next command, [lhRgs01,lhRgMeans01] = lme_mass_RgGrow(lhsphere, lhRe01, lhTh01,lhcortex,2,95); This command took a long time to process, and it caused the whole stop MATLAB works. Is it also because of the X matrix...?
Could you let me know the solution for the X matrix problems ?
Best Wishes,
Han