At the moment, categorical variables are not supported to pass on as a separate argument to the Matlab's glme/lme functions and throws an error if you try to run a glme/lme with separately defined categorical variables. Work-around would be to use string factors as covariate values in the table itself, so Matlab will automatically treat them as covariates. The ability to define categorical variables have to be removed until a solution is found.
At the moment, categorical variables are not supported to pass on as a separate argument to the Matlab's glme/lme functions and throws an error if you try to run a glme/lme with separately defined categorical variables. Work-around would be to use string factors as covariate values in the table itself, so Matlab will automatically treat them as covariates. The ability to define categorical variables have to be removed until a solution is found.