The R package Complete Box Jenkins Time Series Analysis or CBJTSA provides very informative methods and tools for showing, analysing and fitting univarite time series with Box Jenkins ARIMA models.
You can install the stable version from Github
# install.packages("remotes")
remotes::install_github("danipequelangos/CBJTSA")
If the help documentation shows Internal Server Error
try to restart R after installing the package.
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