This is a constructor function for the "covBM" class, representing a Brownian motion
component in terms of a continuous variable. The object created is a special type of
corStruct.
covBM
Usage
covBM(value = 1, form = ~1)
Arguments
value
Numeric argument providing starting value for the scale parameter of
Brownian motion process relative to residual error variance for optimisation.
form
A one-sided formula of the form ~t|g, where t represents a continuous
variable (usually time) and g represents a grouping factor, i.e. with a separate
Brownian motion process modelled at each level.
Value
An object of class "covBM" and inheriting from "corStruct".