Volcano plot
The volcano plot visualizes the relationship between p-values and fold changes of features across samples.
- X-axis: log2 fold change
- Y-axis: -log10 p-value
You can switch between regular p-values and FDR-adjusted p-values using the selector above the plot.
Features of interest typically have strong fold changes and high statistical significance and therefore appear in the upper-left and upper-right corners.
Features that meet the applied filter settings are colored according to regulation direction:
- Blue: down-regulated in group 1 relative to group 2
- Red: up-regulated in group 1 relative to group 2
Hover over any feature to view its name, fold change, and p-value (figure 50).
Click a feature to label it; remove labels by selecting Clear selection.
Figure 50: Hover over features in the volcano plot to see names and values.
Vertical and horizontal lines indicate the active filtering thresholds. You can drag these lines to adjust the thresholds; the filter values displayed below will update accordingly.
Download volcano plot. To download the volcano plot, hover the plot and click on Volcano plot.