Description Usage Arguments Value Author(s) References See Also Examples
Approximate confidence intervals for the parameters in the linear
model represented by object
are obtained, using
a normal approximation to the distribution of the (restricted)
maximum likelihood estimators (the estimators are assumed to have a
normal distribution centered at the true parameter values and with
covariance matrix equal to the negative inverse Hessian matrix of the
(restricted) loglikelihood evaluated at the estimated parameters).
Confidence intervals are obtained in an unconstrained scale first,
using the normal approximation, and, if necessary, transformed to the
constrained scale.
1 2 
object 
an object inheriting from class 
level 
an optional numeric value for the interval confidence level. Defaults to 0.95. 
which 
an optional character string specifying the subset
of parameters for which to construct the confidence
intervals. Possible values are 
... 
some methods for this generic require additional arguments. None are used in this method. 
a list with components given by data frames with rows corresponding to
parameters and columns lower
, est.
, and upper
representing respectively lower confidence limits, the estimated
values, and upper confidence limits for the parameters. Possible
components are:
coef 
linear model coefficients, only present when 
corStruct 
correlation parameters, only present when

varFunc 
variance function parameters, only present when

sigma 
residual standard error. 
José Pinheiro and Douglas Bates [email protected]
Pinheiro, J.C., and Bates, D.M. (2000) "MixedEffects Models in S and SPLUS", Springer.
gls
, intervals
,
print.intervals.gls
1 2 3 
Approximate 95% confidence intervals
Coefficients:
lower est. upper
(Intercept) 10.908531 12.2163982 13.5242656
sin(2 * pi * Time) 4.044019 2.7747122 1.5054050
cos(2 * pi * Time) 2.272201 0.8996047 0.4729919
attr(,"label")
[1] "Coefficients:"
Correlation structure:
lower est. upper
Phi 0.6684247 0.7532079 0.8186683
attr(,"label")
[1] "Correlation structure:"
Residual standard error:
lower est. upper
3.974690 4.616172 5.361183
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.