corAR1 class,
representing an autocorrelation structure of order 1. Objects
created using this constructor must be later initialized using the
appropriate
initialize method.
corAR1(value, form, fixed)
t and, optionally, a grouping factor
g. A covariate for
this correlation structure must be integer valued. When a grouping
factor is present in
form, the correlation structure is assumed to
apply only to observations within the same grouping level;
observations with different grouping levels are assumed to be
uncorrelated. Defaults to `~ 1', which corresponds to using the order
of the observations in the data as a covariate, and no groups.
FALSE, in which case
the coefficient is allowed to vary.
corAR1, representing an autocorrelation
structure of order 1.
Box, G.E.P., Jenkins, G.M., and Reinsel G.C. (1994) "Time Series Analysis: Forecasting and Control", 3rd Edition, Holden-Day.
## covariate is observation order and grouping factor is Mare cs1 <- corAR1(0.2, form = ~ 1 | Mare)