seasadj function

Seasonal adjustment

seasadj removes the seasonal component of time series.

seasadj(mdl, ...)

## S3 method for class 'um'
seasadj(
  mdl,
  z = NULL,
  method = c("mixed", "forecast", "backcast"),
  envir = NULL,
  ...
)

Arguments

• mdl: an object of class um or tfm.
• ...: additional arguments.
• z: an object of class ts.
• method: forward/backward forecasts or a mixture of the two.
• envir: environment in which the function arguments are evaluated. If NULL the calling environment of this function will be used.

Returns

seasadj returns a seasonal adjusted time series.

Examples

Y <- AirPassengers
um1 <- um(Y, bc = TRUE, i = list(1, c(1,12)), ma = list(1, c(1,12)))
Y <- seasadj(um1)
ide(Y)