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# cogent.maths.stats.alpha_diversity.shannon

All Samples(4)  |  Call(2)  |  Derive(0)  |  Import(2)

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_heip_e(self):
"""heip e should match hand-calculated value"""
c = array([1,2,3,1])
h = shannon(c, base=e)
expected = exp(h-1)/3
```

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_heip_e(self):
"""heip e should match hand-calculated value"""
c = array([1,2,3,1])
h = shannon(c, base=e)
expected = exp(h-1)/3
```