In this paper an association rules technique is used on chords from scraping website ukutabs.com.

This paper describes the step-by-step process behind pcr function in pls package. Achieving this allows to remove not only the first n principal components from regression but any that are desired to improve the output of linear regression.

This is a paper that shows how the DTW algorithm works step-by-step and later clustering with DTW distance is performed on emissions data from Eurostat using heirarchical and PAM methods using dtwclust and dtw packages.