# Canberra

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