Dotplots are very popular for visualizing single-cell RNAseq data. In essence, the dot size represents the percentage of cells that are positive for that gene; the color intensity represents the average gene expression of that gene in a cell type.
It is easy to plot one using Seurat::dotplot or Sccustomize::clustered_dotplot.
However, when you have multiple groups/conditions in your data and you want to
visualize it by groups, it is not that …