Exercise

Number of PCs using scree plot

Now you will implement the elbow method relating to the change in the relative importance of the variance to choose the number of components. We will use the pca.state object containing the PCs of the state.x77 to implement this method.

Instructions

100 XP

Use the screeplot() function to plot the relative importance of the variance explained by the eight PC's of the state.x77 dataset.