Figure 1.

Example of possible running sum statistics. The figure shows all possible running sum statistics for an ordered list of 8 genes of which 4 belong to a functional category. The red labeled running sum statistic has a RSC value of 12 and the corresponding p-value is <a onClick="popup('http://www.biomedcentral.com/1471-2105/8/290/mathml/M1','MathML',630,470);return false;" target="_blank" href="http://www.biomedcentral.com/1471-2105/8/290/mathml/M1">View MathML</a>. The numbers on the x-axis refer to the index and the number of possible running sum values in the current step.

Keller et al. BMC Bioinformatics 2007 8:290   doi:10.1186/1471-2105-8-290
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