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Difference between revisions of "Simpson"

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(New page: '''''*simpson*''''' These files give the classic Simpson Index of diversity. <math>H_{Simpson} = \frac {\sum_{i=1}^{S_{obs}} {S_i \left ( S_i - 1 \right )}}{N \left( N-1 \right )}</ma...)
 
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[[Validate output by making calculations by hand]]
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'''''*.simpson'''''  
  
 
These files give the classic Simpson Index of diversity.  
 
These files give the classic Simpson Index of diversity.  

Revision as of 16:06, 14 January 2009

Validate output by making calculations by hand

*.simpson

These files give the classic Simpson Index of diversity.


<math>H_{Simpson} = \frac {\sum_{i=1}^{S_{obs}} {S_i \left ( S_i - 1 \right )}}{N \left( N-1 \right )}</math>


For the Amazonian dataset, the Simpson Index is 0.0044.


Example calculations below will be performed using data from the 70.fn.shared file with an OTU definition of 0.03.