Multivariate t-test (parametric and by permutation)
Program to conduct a Multivariate t-test (Hotelling’s T^2). Code includes traditional paramteric test with examples, and its non parametric counterpart under permutation.
multivariate t test.r
Rarefaction
As the size of sampling units increase, so do the number of taxa. The rarefaction method (Sanders 1968, Hulbert 1971) can be used to assess whether diversity comparison between samples of varying sizes is possible. This R program operationalizes rarefaction and provides an example.
rarefaction.r