Figure 2
From: MADAM - An open source meta-analysis toolbox for R and Bioconductor
Volcano plot for meta-analysis. Similar to the volcano plots that are used in classical microarray analysis, the function plotMAVolcano enables the plotting of a volcano plot for meta-analysis. This is performed by plotting an effect size against a significance. Since two separate null hypotheses might be investigated in the meta-analysis, the form of the plot differs from the classical volocano-like shape. A user might also provide a list of interesting features to be highlighted automatically.