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src/c/o/cogent-1.5.3/tests/test_maths/test_stats/test_alpha_diversity.py   cogent(Download)
from math import e
from cogent.util.unit_test import TestCase, main
from cogent.maths.stats.alpha_diversity import expand_counts, counts, observed_species, singles, \
    doubles, osd, margalef, menhinick, dominance, simpson, \
    simpson_reciprocal, reciprocal_simpson,\
    def test_fisher_alpha(self):
        """fisher alpha should match hand-calculated value."""
        c = array([4,3,4,0,1,0,2])
        obs = fisher_alpha(c)
        self.assertFloatEqual(obs, 2.7823795367398798)

src/p/y/pycogent-HEAD/tests/test_maths/test_stats/test_alpha_diversity.py   pycogent(Download)
from math import e
from cogent.util.unit_test import TestCase, main
from cogent.maths.stats.alpha_diversity import expand_counts, counts, observed_species, singles, \
    doubles, osd, margalef, menhinick, dominance, simpson, \
    simpson_reciprocal, reciprocal_simpson,\
    def test_fisher_alpha(self):
        """fisher alpha should match hand-calculated value."""
        c = array([4,3,4,0,1,0,2])
        obs = fisher_alpha(c)
        self.assertFloatEqual(obs, 2.7823795367398798)