The forecast package uses the base R graphics for all plots, but some people may prefer to use the nice graphics available using the ggplot2 package.
In the following two posts, Frank Davenport shows how it can be done:
- Plotting forecast() objects in ggplot part 1: Extracting the Data
- Plotting forecast() objects in ggplot part 2: Visualize Observations, Fits, and Forecasts
Related Posts:
- Flat forecasts
- forecast package v4.0
- Out-of-sample one-step forecasts
- Batch forecasting in R
- Twenty rules for good graphics
