[T,R,K,Z,H,D,Cov] = sspace(V,...)
V [ VAR ] - VAR object.T [ numeric ] - Transition matrix.
R [ numeric ] - Matrix of instantaneous effect of residuals (forecast errors).
K [ numeric ] - Constant vector in transition equations.
Z [ numeric ] - Matrix mapping transition variables to measurement variables.
H [ numeric ] - Matrix at the shock vector in measurement equations (all zeros in VAR objects).
D [ numeric ] - Constant vector in measurement equations (all zeros in VAR objects).
U [ numeric ] - Transformation matrix for predetermined variables.
Cov [ numeric ] - Covariance matrix of residuals (forecast errors).