confint {base} | R Documentation |
Computes confidence intervals for one or more parameters in a fitted
model. Base has a method for objects inheriting from class
"lm"
.
confint(object, parm, level = 0.95, ...)
object |
a fitted model object. |
parm |
a specification of which parameters are to be given confidence intervals, either a vector of numbers or a vector of names. If missing, all parameters are considered. |
level |
the confidence level required. |
... |
additional argument(s) for methods |
confint
is a generic function with no default method.
For objects of class "lm"
the direct formulae based on t values
are used.
Package MASS contains methods for "glm"
and "nls"
objects.
A matrix (or vector) with columns giving lower and upper confidence limits for each parameter. These will be labelled as (1-level)/2 and 1 - (1-level)/2 in % (by default 2.5% and 97.5%).
data(mtcars) fit <- lm(100/mpg ~ disp + hp + wt + am, data=mtcars) confint(fit) confint(fit, "wt")