This function is a constructor for the cor_arma class
allowing for autoregressive effects of the response only.
Usage
cor_arr(formula = ~1, r = 1)
Arguments
formula
A one sided formula of the form ~ t, or ~ t | g,
specifying a time covariate t and, optionally, a grouping factor g.
A covariate for this correlation structure must be integer valued.
When a grouping factor is present in formula, the co
r
A non-negative integer specifying the autoregressive response (ARR) order.
See 'Details' for differences of AR and ARR effects. Default is 0.
Value
An object of class cor_arma containing solely
autoregressive response terms.
Details
In most packages, AR effects refer to autocorrelation of residuals.
brms also implements autocorrelation of the response, which can be specified
using argument r in the cor_arma and cor_arr functions.