使用期限*
许可形式单机版
原产地美国
介质下载
适用平台Windows
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Bray-Curtis (Polar)
We offer numerous options and improvements beyond Bray and Curtis' original method, such as perpendicularized axes and variance-regression endpoint selection.
![PC-ORD中文版使用教程](//l.b2b168.com/2019/07/29/10/20190729103943513724.jpg)
Principal Coordinates Analysis (PCoA)
Principal Coordinates Analysis is an eigenanalysis technique similar to PCA, except that one extracts eigenvectors from a distance matrix among sample units (rows), rather than from a correlation or covariance matrix. In PCoA one can use any square symmetrical distance matrix, including semi-metrics such as Sorensen distance, as well as metric distance measures such as Euclidean distance.
![PC-ORD中文版使用教程](//l.b2b168.com/2020/06/18/15/202006181534408575324.jpg)
The objective of my courses is the understanding of the process of multivariate data analysis and not so much on the technical part, even the latter results in a more thorough understanding of the procedures applied. When students understand why and how to effectively do multivariate statistical analyses of their data, they can then use, with little effort, other programs or packages as well.
![PC-ORD中文版使用教程](//l.b2b168.com/2019/07/18/10/201907181030484134514.jpg)
Blocked Multi-Response Permutation Procedures (MRBP)
Randomized block experiments or paired-sample data can be analyzed with a variant of MRPP called MRBP or blocked MRPP. PC-ORD allows up to 1000 blocks and 100 groups.
Indicator Species Analysis
Dufrêne and Legendre’s (1997) method provides a simple, intuitive solution to the problem of evaluating species associated with groups of sample units. It combines information on the concentration of species abundance in a particular group and the faithfulness of occurrence of a species in a particular group. It produces indicator values for each species in each group. These are tested for statistical significance using a Monte Carlo technique.
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