Module 8: Clustering

Topic: K-means clustering, hierarchical clustering, choosing the number of clusters, apply family functions.

Learning Objectives

• Perform K-means clustering with kmeans()
• Build dendrograms with hierarchical clustering
• Choose K using elbow plots and silhouette scores
• Use apply, lapply, sapply efficiently

Slides

• L14 K-clustering (PDF)
• L15 Hierarchical Clustering (PDF)

R Code

• L14_K-means_clustering.R
• L15_hierarchical_clustering.R
• apply_functions_tutorial.R

Data

• gene_expression.csv
• a_thaliana.csv

Key Packages

# base R — no extra packages required

Assignment

HW8: Clustering — due Module 9 Wednesday. Submit on Canvas.