Recently Updated Pages
2.5 Dissimilarity coefficients
The converse concept to similarity is that of dissimilarity, the degree to which two samples are ...
2STAGE for displaying ‘interactions’
A very different way of using 2nd stage matrices is best accessed through the alternative entry o...
Conclusions on comparing resemblance coefficients
Clarke KR, Somerfield PJ, Chapman MG 2006, J Exp Mar Biol Ecol 330: 55-80 discuss this analysis (...
2STAGE for resemblance coefficients (Clyde study)
The technique of 2nd stage plots has also been used (Clarke KR, Somerfield PJ, Chapman MG 2006, J...
Second-stage nMDS (Morlaix macrofauna)
The illustration below has calculated all combinations of species (sp), genus (gn) and family (fm...
Aggregation & transforms (Morlaix macrofauna)
Chapter 10 of CiMC gives several examples of aggregating species matrices to higher taxa – using ...
Rationale for 2nd stage MDS
As seen above, the $\rho$ statistic, which rank correlates the elements of two similarity matrice...
(Leschenault estuarine fish, W Australia)
Veale L et al 2014 J Fish Biol 85: 1320-1354 describe trawl sampling for nearshore estuarine fish...
2-way RELATE for cyclicity
A 2-way RELATE version of the above test where there are no replicates, and the cyclic factor und...
1.6 Example: Garroch Head macrofauna
describe the sampling of a transect of 12 sites across the sewage-sludge disposal ground at Garr...
2.1 Similarity for quantitative data matrices
Data matrix The available biological data is assumed to consist of an array of p rows (species) a...
2.2 Example: Loch Linnhe macrofauna
A trivial example, used in this and the following chapter to illustrate simple manual computation...
1.3 Example: Frierfjord macrofauna
The first example is from the IOC/GEEP practical workshop on biological effects of pollutants (),...
1.1 Introduction
The purpose of this opening chapter is twofold: a) to introduce some of the data sets which are u...
0.1 Introduction
Third edition The third edition of this unified framework for non-parametric analysis of multivar...
Model matrix for 2D Euclidean; Cyclicity (Sea-loch macrofauna)
The other two Model Matrix options are (Type•Cyclicity (factor as cycles)) and (Type•Euclidean 2D...
Expand Samples or Expand resemblances
The Exe environment matrix does not seem (from Plots>Draftsman Plot or Histogram Plot) to contain...
Expanded RELATE test (Exe nematodes)
As an example of Tools>Expand Samples on a data matrix (or Tools>Expand on a resemblance matrix, ...
Expanding an (abiotic) data matrix
A RELATE test could equally well have been carried out between the Ekofisk community pattern and...
Other Model Matrix options
The conclusion is, of course, consistent with the different, but closely-related, ordered ANOSIM ...