Null models are pattern-generating models that deliberately exclude a mechanism of interest, and allow for randomization tests of ecological and biogeographic data. Although they have had a ...

A well-known problem in numerical ecology is how to recombine presence-absence matrices without altering row and column totals. A few solutions have been proposed, but all of them present some issues ...

The distribution of species on islands -- Patterns or fantasies? -- Species co-occurrences -- The night sky effect -- Patterns in nature -- Finding the null -- What this book is about -- How this book ...

Bacteriophages are the most abundant biological life forms on Earth. However, relatively little is known regarding which bacteriophages infect and exploit which bacteria. A recent meta-analysis showed ...

Aim The nestedness temperature of presence-absence matrices is currently calculated with the nestedness temperature calculator (NTC). In the algorithm implemented by the NTC: (1) the line of perfect ...

where matrix is a numeric or character matrix or quoted literal. The XSECT function returns as a row vector the sorted set (without duplicates) of the element values that are present in all of its ...

The students who will be appearing for CBSE Class 12th Mathematics Examination 2020 on March 17, 2020, can go through the below-mentioned important questions for Chapter 3- Matrices. These Questions ...