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raum
2007 Aug 14
0
Comparing long species lists via Sorensons dissimilarity
...wo samples if QS is less than 50% than the samples are considered dissimilar, what is 100%? I mean 50% of what?
There are a number of other tests that I can run using R. These are squared euclidan, manhattan, bray-curtis, jaccard, ruzicka, (dis)similarity ratio, ochiai, cosine compliment, and Raup-crick. Would it be advantageous to run these now that I have my sorensons result? It is especially easy for me to run the Bray-Curtis all I would need to do is change the terms from ‘binary’ to ‘minimum’ and re-run. Would Bray-Curtis be a Percentage Similarity unlike the others?
Here is an ex...
2001 Nov 13
1
rarefaction variance
Here's a question for ecologists on the r-help list-- I'm addressing this
to ecologists in particular because they're most likely to be familiar
with the equation in question but I'll be happy to discuss the problem
with anyone who's willing to take a whack at it.
I'm trying to write a function to calculate the large sample variance of
species richness estimates by