# tsdiag

##### Diagnostic Plots for Time-Series Fits

A generic function to plot time-series diagnostics.

- Keywords
- ts

##### Usage

`tsdiag(object, gof.lag, …)`

##### Arguments

- object
a fitted time-series model

- gof.lag
the maximum number of lags for a Portmanteau goodness-of-fit test

- …
further arguments to be passed to particular methods

##### Details

This is a generic function. It will generally plot the residuals,
often standardized, the autocorrelation function of the residuals, and
the p-values of a Portmanteau test for all lags up to `gof.lag`

.

The methods for `arima`

and `StructTS`

objects
plots residuals scaled by the estimate of their (individual) variance,
and use the Ljung--Box version of the portmanteau test.

##### Value

None. Diagnostics are plotted.

##### See Also

##### Examples

`library(stats)`

```
# NOT RUN {
require(graphics)
fit <- arima(lh, c(1,0,0))
tsdiag(fit)
## see also examples(arima)
(fit <- StructTS(log10(JohnsonJohnson), type = "BSM"))
tsdiag(fit)
# }
```

*Documentation reproduced from package stats, version 3.5.0, License: Part of R 3.5.0*

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