a resource utilization matrix (rows = species, columns = discrete
resource states) filled with non-negative real numbers.

speciesData


Randomizes a numeric utilization matrix speciesData by
reshuffling the non-zero elements within each row.


Given a site by species interaction matrix, users can make inferences about species interactions by performance hypothesis comparing test statistics against a null distribution. The current package provides algorithms and metrics for niche-overlap, body size ratios and species co-occurrence. Users can also integrate their own algorithms and metrics within these frameworks or completely novel null models. Detailed explanations about the underlying assumptions of null model analysis in ecology can be found at http://ecosimr.org.

ra4: RA4 Niche Overlap Randomization Algorithm

Description

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Examples