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非度量多维排列 NMDS (Non-metric multidimensional scaling)分析
多维排列 (Multidimensional scaling,MDS)是可视化多变量样品(如多个物种丰度、多个基因表达)相似性水平的一种方法。其基于距离矩阵进行一系列的排序分析。 经典的MDS(CMDS)分析就是前面提到的PCoA分析,也称为度量性MDS分析。而与之相对的是非度量多维排列(Non-metric ...
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