Monthly Archives: February 2016

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

Speedy Permutation Test

Program to conduct simple (univariate) permutation test between 2 groups. Two versions, in “for loop” and a spedier version. Dataset: Difference in means of some trait (1:50) between 2 populations (A,B)
speedyperm.r