Let's start with installing the R packages needed for this chapter, if you have not done so already:
> library(magrittr)
> install.packages("cluster")
> install.packages("dendextend")
> install.packages("ggthemes")
> install.packages("HDclassif")
> install.packages("NbClust")
> install.packages("tidyverse")
> options(scipen=999)
The dataset is in the HDclassif package. Load the data and examine the structure with the str() function:
> library(HDclassif)
> data(wine)
> str(wine)
'data.frame': 178 obs. of 14 variables:
$ class: int 1 1 1 1 1 1 1 1 1 1 ...
$ V1 : num 14.2 13.2 13.2 14.4 13.2 ...
$ V2 : num 1.71 1.78 2.36 1.95 2.59 1.76 1.87 2.15 1.64 1.35 ...
$ V3 : num 2.43 2.14 2.67 2.5 2.87 2.45 2.45 2.61 2.17 2.27 ...
$ V4 : num 15.6 11.2 18...
