18.1 Algorithms Setup

20210103 Packages used in this chapter include nnet (Ripley 2021), rpart (Therneau and Atkinson 2019), and rattle (G. Williams 2021).

Packages are loaded into the currently running R session from your local library directories on disk. Missing packages can be installed using utils::install.packages() within R. On Ubuntu, for example, R packages can also be installed using $ wajig install r-cran-<pkgname>.

# Load required packages from local library into the R session.

library(nnet)
library(rpart)        # ML: decision tree rpart().


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