Clustermaps and Annotations

Clustermaps add hierarchical clustering to heatmaps, automatically grouping similar rows and columns to reveal hidden patterns.

Understanding Clustering

Heatmap with Dendrograms

Annotated Heatmap with Row/Column Colors

Multiple Annotation Tracks

Practice: Gene Expression Clustermap

Key Takeaways

• Clustering reorders rows/columns to group similar items
• Dendrograms show hierarchical relationships
• Color annotations reveal additional categorical information
• Multiple annotation tracks can show several variables
• Clustermaps help discover hidden patterns in complex data
• Use ward linkage for compact clusters

In the next module, we'll explore time series visualization.