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. Author manuscript; available in PMC: 2009 Sep 15.
Published in final edited form as: Comput Stat Data Anal. 2009 Jun 15;53(8):3094–3102. doi: 10.1016/j.csda.2008.04.026

Fig. 1.

Fig. 1

Wilcoxon rank sum statistics are calculated for each grid to assess differences between cancer and normal sera. Each pH/fraction combination was tested and the p-values are plotted in the above figure. The red/orange section at low fractions of pH 5.1 through 5.7 indicates a possible region in which cancer is expressing above normal.