Exercise

Volcano plot

Now you will visualize the extent of differential expression for each contrast with a volcano plot, which displays the log odds of differential expression on the y-axis versus the log fold change on the x-axis.

Instructions

100 XP

The fitted model object fit2 has been loaded in your workspace. The limma package is already loaded.

Access the gene symbols (symbol) from the data frame fit2$genes.
Create a volcano plot that highlights the top 5 genes for each of the 3 contrasts.