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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Comprehensive Includes major analysis tools plus unique tools for community analyses
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* Help System Extensive context-sensitive help system
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Weighted Averaging
The simplest yet often effective method of ordination is weighted averaging. The essential operation is the same: a set of pre-assigned species weights (or weights for species groups) are used to calculate scores for sites (sample units). The calculation is a weighted averaging for species or species groups actually present in a sample unit. Weighted averaging used in Federal Manual and numerous ecological indices.
![PC-ORD正版软件安装](//l.b2b168.com/2019/07/18/10/201907181030407449034.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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