Scatter plots for the number of probes matching a reference sequence. Scatter plot of the total number of probes matching a reference sequence against the number of probes remaining after removing the probes matching several reference sequences. Colored areas are displayed to indicate the z-axis, the number of probes occupying each spot in the graph. A grid-like pattern can be observed in the lower-left corner of the plot. The size of the cells is 11 probes, which is the number of probes contained in most of the probe sets in the official mapping.
Gautier et al. BMC Bioinformatics 2004 5:111 doi:10.1186/1471-2105-5-111