# Canberra

$D_{Canberra} = \frac {1}{S_{T}} \sum_{j=1}^{S_T} \frac {|S_{Aj} - S_{Bj}|} {S_{Aj} + S_{Bj} }$

where, $$S_{Aj}$$ is the abundance of the jth OTU in sample A

$$S_{Bj}$$ is the abundance of the jth OTU in sample B

$$S_{T}$$ is the number of OTU’s combined between sample A and sample B