add_lag: Add lags to state equation
Description
Add lags to state equation
Usage
add_lag(sys, name, type, lags = NULL)
Value
The input list sys
with updated matrices.
Arguments
- sys
list with system matrices
- name
name ob observation equation
- type
type of trend, see details
- lags
(optional) number of lags added to state equation, e.g. since
other equations load on them