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Gives a measure of the species divesity in the fossil data.
Hill.N2.core(spp)
Species data
Minimum, first quartile and median effective number of species
Uses Hill.N2 from the rioja package
Hill.N2
Hill, M. O. (1973) Diversity and evenness: a unifying notation and its consequences. Ecology 54: 427--432.
# NOT RUN { require(rioja) data(RLGH) Hill.N2.core(RLGH$spec) # }
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