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