MA plot
An MA plot visualizes differences between two groups relative to average signal intensity. This is useful to assess potential biases in the data. Typically, most peak intensities aren't expected to change between conditions. This means points in the plot should be grouped around a horizontal line at 0, corresponding to no change. MA plots are also useful to get a quick visual impression of how large the differences between groups are.
Like the plotting functions you used earlier, DiffBind provides a function, dba.plotMA(), to create MA plots that can extract all necessary information from the DBA object.
Este ejercicio forma parte del curso
ChIP-seq with Bioconductor in R
Instrucciones del ejercicio
- Use the
dba.plotMA()function to create an MA plot. - Take a look at the plot. Note how significant differences are highlighted.
Ejercicio interactivo práctico
Prueba este ejercicio y completa el código de muestra.
# Create an MA plot
___(ar_diff)