the percent of samples in each level of the given metadata
variable
Value
core.OTU returns a list containing otus that present in a
pre-defined percent of samples in each level of a given metadata
category. The outputs describe the following information for
each level of a given metadata variable: 1) core otuID; 2) taxa
the core otus assigned to; and 3) percent of core otus sequences
vs. total sequences in each levels of the given metadata
variable. The last item in the list show the same information
of otus that in all levels.