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Volcano plot

Volcano plots visualize the relationship between the difference between groups (expressed as log fold change) and the p-values of the test comparing the peak intensities. This provides a visual overview of statistically significant results and their effect sizes. DiffBind provides the function dba.plotVolcano() to create these plots.

The ar_diff object contains the results of the differential binding analysis.

This exercise is part of the course

ChIP-seq with Bioconductor in R

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Exercise instructions

  • Create a volcano plot.
  • Examine the plot. Where are the significant results located?

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Create a volcano plot
___(ar_diff)
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