fixef.coxme {coxme}

Extraction functions for Coxme

Description

Extract the fixed effects, randome effects, variance of the fixed effects, or variance of the random effects from a coxme model.

Usage

## S3 method for class 'coxme'
fixef(object, ...)
## S3 method for class 'coxme'
ranef(object, ...)
## S3 method for class 'coxme'
vcov(object, ...)
## S3 method for class 'coxme'
VarCorr(x, ...)

Arguments

object

an object inheriting from class coxme representing the result of a mixed effects Cox model.

x

an object inheriting from class coxme representing the result of a mixed effects Cox model.

...

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

Value

the fixed effects are a vector and the variance of the fixed effects is a matrix. The random effects will be a list with one element for each random effects terms, as will be their variance.

Author(s)

Terry Therneau

See Also

coxme, random.effects, fixed.effects

Examples

rat1 <- coxme(Surv(time, status) ~ rx + (1|litter), rats)
fixed.effects(rat1)
vcov(rat1)
random.effects(rat1)[[1]]  #one value for each of the 50 litters
VarCorr(rat1)