coxme (version 2.2-1)

lmekin.object: lmekin object

Description

This class of object is returned by the lmekin function to represent a fittd mixed effect linear model. Objects of this class currently have methods for print and residuals.

Value

• A list with the folling components:
• coefficients
  a list with components fixed and random; the first will be NULL for a model with no fixed effects. The random component is itself a list, with an element for each random effect.
• var
  the variance matrix of the fixed effects
• vcoef
  the parameters of the variance matrix of the random effects.
• vvar
  variance matrix for vcoef
• residuals
  vector of residuals from the fit
• method
  either "ML" or "REML"
• loglik
  the log-likelihood for the fitted model
• sigma
  the estimated residual error
• n
  number of observations used
• call
  a copy of the call
• na.action
  this will be present if any observations were removed due to missing values

Details

The random effects are modeled internally as $N(0, \sigma^2 A)$ where $\sigma^2$ is the residual variance. The parameters of vcoef refer to $A$. THe printed results for the model have been multiplied by $\sigma$, removing the factorization.

The variance matrix vvar is for the transformed parameters. For the details of the transformation see the individual variance functions. The coxmeFull routine, for instance, uses a log transform for variances. Use this with caution.

See Also

lmekin, coxmeFull, coxmeMlist