covBM {covBM} R Documentation

## covBM

### Description

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".

### Examples

cov1<-covBM(form=~time|group)


[Package covBM version 0.1.0 Index]