Week 14: RNA-Seq count data analysis in R

Authors
Affiliation

Menuka Bhandari

Jelmer Poelstra

Published

November 24, 2025



1 Overview

This is the final lecture of the R program. This week, we will cover the use of the DESeq2 package to identify differentially expressed genes (both up-regulated and down-regulated). We will begin by learning how to create a DESeq2 object, which consists of three key components: metadata, count table, and statistical design. After that, we will perform differential expression analysis and visualize the results using a volcano plot.

2 Lectures & Learning goals

Some of the things you will learn this week:

RNA-Seq count data analysis in R

  • Create an R object that also incorporates the metadata
  • Perform exploratory data analysis including a PCA
  • Run a Differential Expression (DE) analysis
  • Extract and visualize the DE results

3 Assignments and exercises

4 Further resources

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