tfest
provides preestimates of the transfer function
between an output and an input.
tfest(y, x, delay = 0, p = 1, q = 2, um.y = NULL, um.x = NULL, n.back = NULL)
output, a ts object or a numeric vector.
input, a ts object or a numeric vector.
integer.
order of the AR polynomial, double.
order of the MA polynomial, double.
univariate model for output, um object or NULL.
univariate model for input, um object or NUL.
number of backcasts.
A "tf" S3 object