Lab Exercise: Clustering Zoo Animals

Use the dataset create below for the following questions.

zoo.data <- read.csv('http://www.math.montana.edu/ahoegh/teaching/stat408/datasets/ZooClean.csv')
rownames(zoo.data) <- zoo.data[,1]
zoo.data <- zoo.data[,-1]

a. MDS viz

Use multidimensional scaling to visualize the data in two dimensions.

b. MDS interpretation

What are two animals that are very similar and two that are very different?

c. Hierarchical Clustering

Create a hierachical clustering object for this dataset.

Why are a leopard and raccoon clustered together for any cluster size?

d. Cluster Viz

Now add colors corresponding to four different clusters to your MDS plot.

Interpret what each of the four clusters correspond to.