intervals.lmList            package:nlme            R Documentation

Confidence Intervals on lmList Coefficients

Description:

     Confidence intervals on the linear model coefficients are obtained
     for each 'lm' component of 'object' and organized into a three
     dimensional array. The first dimension corresponding to the names
     of the 'object' components. The second dimension is given by
     'lower', 'est.', and 'upper' corresponding, respectively, to the
     lower confidence limit, estimated coefficient, and upper
     confidence limit. The third dimension is given by the coefficients
     names.

Usage:

     ## S3 method for class 'lmList':
     intervals(object, level, pool, ...)

Arguments:

  object: an object inheriting from class 'lmList', representing a list
          of 'lm' objects with a common model. 

   level: an optional numeric value with the confidence level for the
          intervals. Defaults to 0.95. 

    pool: an optional logical value indicating whether a pooled
          estimate of the residual standard error should be used.
          Default is 'attr(object, "pool")'. 

     ...: some methods for this generic require additional arguments. 
          None are used in this method.

Value:

     a three dimensional array with the confidence intervals and
     estimates for the coefficients of each 'lm' component of 'object'.

Author(s):

     Jose Pinheiro Jose.Pinheiro@pharma.novartis.com and Douglas Bates
     bates@stat.wisc.edu

References:

     Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models in S
     and S-PLUS", Springer.

See Also:

     'lmList', 'intervals', 'plot.intervals.lmList'

Examples:

     fm1 <- lmList(distance ~ age | Subject, Orthodont)
     intervals(fm1)

