lmeObject {nlme} | R Documentation |

An object returned by the `lme`

function, inheriting from class
`lme`

and representing a fitted linear mixed-effects
model. Objects of this class have methods for the generic functions
`anova`

, `coef`

, `fitted`

, `fixed.effects`

,
`formula`

, `getGroups`

, `getResponse`

,
`intervals`

, `logLik`

, `pairs`

, `plot`

,
`predict`

, `print`

, `random.effects`

, `residuals`

,
`sigma`

, `summary`

, `update`

, and `vcov`

.

The following components must be included in a legitimate `lme`

object.

`apVar` |
an approximate covariance matrix for the
variance-covariance coefficients. If |

`call` |
a list containing an image of the |

`coefficients` |
a list with two components, |

`contrasts` |
a list with the contrasts used to represent factors in the fixed effects formula and/or random effects formula. This information is important for making predictions from a new data frame in which not all levels of the original factors are observed. If no factors are used in the lme model, this component will be an empty list. |

`dims` |
a list with basic dimensions used in the lme fit,
including the components |

`fitted` |
a data frame with the fitted values as columns. The leftmost column corresponds to the population fixed effects (corresponding to the fixed effects only) and successive columns from left to right correspond to increasing levels of grouping. |

`fixDF` |
a list with components |

`groups` |
a data frame with the grouping factors as columns. The grouping level increases from left to right. |

`logLik` |
the (restricted) log-likelihood at convergence. |

`method` |
the estimation method: either |

`modelStruct` |
an object inheriting from class |

`numIter` |
the number of iterations used in the iterative algorithm. |

`residuals` |
a data frame with the residuals as columns. The leftmost column corresponds to the population residuals and successive columns from left to right correspond to increasing levels of grouping. |

`sigma` |
the estimated within-group error standard deviation. |

`varFix` |
an approximate covariance matrix of the fixed effects estimates. |

JosÃ© Pinheiro and Douglas Bates bates@stat.wisc.edu

`lme`

, `lmeStruct`

[Package *nlme* version 3.1-131 Index]