It has a large number of functions related to cluster analysis. According to query network pharmacology, cluster analysis in cluster network pharmacology can be divided into two categories, one is to deal with classification, which is called Q type, and the other is to deal with variables, which is called R type. R language has a large number of functions related to cluster analysis. Cluster analysis is a statistical method that divides research objects (samples or variables) into multiple categories composed of similar objects.