signal extracts the signal of a TF model.
signal(mdl, ...)# S3 method for tfm
signal(mdl, y = NULL, diff = TRUE, envir = NULL, ...)
an object of the class tfm.
additional arguments.
output of the TF model if it is different to that of the
tfm object.
logical. If TRUE, the noise is differenced with the "i" operator of the univariate model of the noise.
environment in which the function arguments are evaluated. If NULL the calling environment of this function will be used.
A "ts" object.