"coef"(object, ...)
"vcov"(object, ...)
"residuals"(object, ...)
"fitted"(object, ...)
"print"(x, digits = max(3, getOption("digits") - 3), ...)
"plot"(x, ask = interactive(), ...)"arma"; usually, a result
of a call to arma.printCoefmat.plot method work interactively? See
interactive.coef, a numeric vector; for vcov, a numeric matrix;
for residuals and fitted a univariate time series;
for plot and print, the fitted ARMA model object.
arma