Exercise

Using the princomp function

In this exercise you will use the princomp() function to calculate the principal components (PCs) of a dataset. We will use the pca.state object created in this exercise throughout the rest of this chapter.

Instructions

100 XP

Calculate the principal components, and the scores of the PCs, of the state.x77 dataset based on the correlation matrix and store it as pca.state.
Provide a plot and print the summary of the principal component object.