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适用平台Windows
北京天演融智软件有限公司（科学软件网）前身是北京世纪天演科技有限公司，成立于2001年，专注为国内高校、科研院所和以研发为主的企事业单位提供科研软件和服务的国家。
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.
Legendre和Legendre (1998)提出了Gower相似系数（S19）的修改版本，称之为" asymmetrical"，因为匹配零点的处理不同于非零值。它与Gower系数相同，但不包括定量变量（0,0）对,因此，部分相似度的总和不是由p变量划分的，而是由p非（0,0）对的数目来划分的。
请注意，这种“不对称”的感觉不同于矩阵对称性。如果Legendre的非对称版本Gower的相似性被转换为距离（或相），并用于建立距离矩阵，这仍然是对称矩阵。换句话说，项目A和B之间的距离与B和A之间的距离相同，即使使用Gower的相似性的不对称版本。为了避免这种混乱，PC-ORD使用菜单系统中的术语"Gower, Ignore 0,0"，并输出文件。
PC-ORD电脑版是一款优秀的生态学数据处理软件,PC-ORD电脑版界面友好,功能强大,PC-ORD电脑版支持PCA分析
Two-way Cluster Analysis
The purpose of our two-way clustering (also known as biclustering) is to graphically expose the relationship between cluster analyses and your individual data points. The resulting graph makes it easy to see similarities and differences between rows in the same group, rows in different groups, columns in the same group, and columns in different groups. You can see graphically how groups of rows and columns relate to each other. Two-way clustering refers to doing a cluster analysis on both the rows and columns of your matrix, followed by graphing the two dendrograms simultaneously, adjacent to a representation of your main matrix. Rows and columns of your main matrix are re-ordered to
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