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.
This exercise is part of the course
Multivariate Probability Distributions in R
Exercise instructions
- Use the
screeplot()
function to plot the relative importance of the variance explained by the eight PC's of thestate.x77
dataset.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Draw screeplot
screeplot(___, type = "l")
grid()