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Update alpha_diversity.py #79

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Update alpha_diversity.py #79

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3 changes: 3 additions & 0 deletions DiversityTools/alpha_diversity.py
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,9 @@ def shannons_alpha(p):
for i in p:
h.append(i * math.log(i))
print("Shannon's diversity: %s" %(-1 *sum(h)))
# Comparison of different communities can be made if we normalize the Shannons by the maximum, It will take a
# value between 0 and 1. Evenness index = 1 means total evenness.
print("Normalized Shannon's diversity (Evenness index): %s" % ((-1 *sum(h)) / math.log((len(p)))))
return (-1 *sum(h))

def berger_parkers_alpha(p):
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