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Old 01-31-2014, 08:35 AM   #3
feralBiologist
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Location: UK

Join Date: Jun 2011
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Thanks, rskr.

After closer inspection, exactTest seems to be using predFC function which, by default, adds a pseudocount of 0.125 to all observations. This seems to answer it. It would be, perhaps, more transparent to have this as a parameter in exactTest itself but once you dig in the documentation it becomes clear anyway.
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