Produces a plot of the inverse AR and MA roots of an ARIMA model. Inverse roots outside the unit circle are shown in red.

## Usage

```
# S3 method for class 'Arima'
plot(
x,
type = c("both", "ar", "ma"),
main,
xlab = "Real",
ylab = "Imaginary",
...
)
# S3 method for class 'ar'
plot(x, main, xlab = "Real", ylab = "Imaginary", ...)
# S3 method for class 'Arima'
autoplot(object, type = c("both", "ar", "ma"), ...)
# S3 method for class 'ar'
autoplot(object, ...)
```

## Arguments

- x
Object of class “Arima” or “ar”.

- type
Determines if both AR and MA roots are plotted, of if just one set is plotted.

- main
Main title. Default is "Inverse AR roots" or "Inverse MA roots".

- xlab
X-axis label.

- ylab
Y-axis label.

- ...
Other plotting parameters passed to

`par`

.- object
Object of class “Arima” or “ar”. Used for ggplot graphics (S3 method consistency).