Biology — Biodiversity Indices
Simpson's and Shannon diversity indices.
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D = 1 - \sum_{i} \left(\frac{n_i}{N}\right)^2
D = \frac{\sum n_i(n_i - 1)}{N(N-1)}
H = -\sum_i p_i \ln p_i
0 \leq D \leq 1
Simpson's and Shannon diversity indices.
D = 1 - \sum_{i} \left(\frac{n_i}{N}\right)^2
D = \frac{\sum n_i(n_i - 1)}{N(N-1)}
H = -\sum_i p_i \ln p_i
0 \leq D \leq 1