# forecast.StructTS

From forecast v4.04
by Rob Hyndman

##### Forecasting using Structural Time Series models

Returns forecasts and other information for univariate structural time series models.

- Keywords
- ts

##### Usage

```
## S3 method for class 'StructTS':
forecast(object,
h=ifelse(object$coef["epsilon"] > 1e-10, 2*object$xtsp[3],10),
level=c(80,95), fan=FALSE, lambda=NULL, ...)
```

##### Arguments

- object
- An object of class "
`StructTS`

". Usually the result of a call to`StructTS`

. - h
- Number of periods for forecasting
- level
- Confidence level for prediction intervals.
- fan
- If TRUE, level is set to seq(50,99,by=1). This is suitable for fan plots.
- lambda
- Box-Cox transformation parameter. Ignored if NULL. Otherwise, forecasts back-transformed via an inverse Box-Cox transformation.
- ...
- Other arguments.

##### Details

This function calls `predict.StructTS`

and constructs an object of class "`forecast`

" from the results.

##### Value

- An object of class "
`forecast`

".The function

`summary`

is used to obtain and print a summary of the results, while the function`plot`

produces a plot of the forecasts and prediction intervals.The generic accessor functions

`fitted.values`

and`residuals`

extract useful features of the value returned by`forecast.StructTS`

.An object of class

`"forecast"`

is a list containing at least the following elements: model A list containing information about the fitted model method The name of the forecasting method as a character string mean Point forecasts as a time series lower Lower limits for prediction intervals upper Upper limits for prediction intervals level The confidence values associated with the prediction intervals x The original time series (either `object`

itself or the time series used to create the model stored as`object`

).residuals Residuals from the fitted model. That is x minus fitted values. fitted Fitted values (one-step forecasts)

##### See Also

##### Examples

```
fit <- StructTS(WWWusage,"level")
plot(forecast(fit))
```

*Documentation reproduced from package forecast, version 4.04, License: GPL (>= 2)*

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