Initializes the transformations applied to exogenous variables.
initializeExo(varNames, D = NULL, L = NULL)
An array of size (n, k, 2)
. The [, , 1]
specifies
the difference order and [, , 2]
the lag order.
A (k x 1)
character vector containing the names of the exogenous
variables.
A (n x k)
matrix containing the difference transformations, see details.
A (n x k)
matrix containing the lag transformations, see details.
For the matrices D
and L
, the rows denote different transformations
to each of the variables in the columns. NA
indicates no transformation.