Fig. 1.

Counts of gene PRTN3 in bone marrow cells in the PAUL data set (See the Methods). Each point corresponds to a cell; the horizontal axis shows the number of reads and the vertical axis shows the number of cells with a fixed number of reads. No library size or cell size normalization has been carried out in these pictures. Note that the tail of the log transformed data is subjectively longer, while the gap between zero counts and nonzero counts appears larger in the rank transformed data