Generating non-stationary ARMA data.
var.sim.break(
nobs,
arlags = NULL,
malags = NULL,
cnst = NULL,
phi = NULL,
theta = NULL,
skip = 200,
sigma,
brk = nobs + 1
)number of time points
the true AR order
the true MA order
the constant
parameter matrix of the AR model
parameter matrix of the MA model
the number of time points to skip at the begining (for stable data)
covariance matrix of the white noise
vector of break points
Matrice of time series data and white noise data