- ADS
- nonSpeech
- anotherOne <------ Not possible for me to know the name, from the output
don't understand output of fitlme, intercept substituted for first line.
4 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hi - I fit some linear mixed effect models using fitlme , but the output always substitutes 'intercept' for the first line of the fixed effect coefficiants. Why is this?
Fixed effects coefficients (95% CIs):
Name Estimate SE tStat DF pValue Lower
{'(Intercept)' } -1.984e-05 6.4305e-06 -3.0853 37 0.0038374 -3.2869e-05
{'voc_registers_ADS' } -9.3714e-06 6.9456e-06 -1.3493 37 0.18545 -2.3444e-05
{'voc_registers_nonSpeech'} 5.4826e-06 6.4513e-06 0.84985 37 0.40088
0 commentaires
Réponses (1)
the cyclist
le 14 Mai 2024
The output is not substituting 'Intercept' for a level of your coefficient.
It looks like your variable voc_registers is categorical, and has three categories:
In this case, MATLAB is using 'anotherOne' as the reference category. (This is described in the documentation for fitlme.) By construction, the coefficient of the reference category is zero, and it is not listed in the output.
'Intercept' is the estimate of the mean when continuous explanatory variables are zero, and categorical explanatory variables are at the reference. So, if your model is
'y ~ alpha + beta*voc_registers'
it is the estimate of the value of alpha.
It can be a bit more complicated, if you have both fixed and random effects for the intercept.
0 commentaires
Voir également
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!