多种比较的选择纯素阿多尼斯
[英]Options for multiple comparisions Vegan Adonis
问题描述
I am using the adonis function in the vegan package to determine differences in dissimilarities in a community (PCB congeners) between several different factors. 
我正在使用vegan软件包中的adonis函数来确定社区（PCB同源物）中不同因素之间差异的差异。 I also have decided to use the simper subroutine to assess which community members contributed most to the observed differences. 我还决定使用simper子例程来评估哪些社区成员对观察到的差异贡献最大。 Is there a way for to include multiple factors in the simper function. 有没有一种方法可以在simper函数中包含多个因素。 I ran this adonis model (see below) and this is my code for the simper routine (which currently doesn't work). 我运行了此adonis模型（请参见下文），这是我的simper例程的代码（当前不起作用）。 Many thanks. 非常感谢。
#Adonis model
pcbtest3<-adonis(pcbcong~FISH_CLASS+REACH+BASIN,data=pcbcov,method="bray",permutations=999)
pcbcong=matrix of community dissimilarities
FISH_CLASS,REACH, BASIN are factors
#Simper
simp<-with(pcbcov, simper(pcbcong,(FISH_CLASS, BASIN, REACH)))
1 个解决方案
解决方案1
0 2014-01-19 23:34:23
simper can be used only with one grouping variable. simper只能与一个分组变量一起使用。
A workaround would be to use interaction() to create a new grouping variable from all three factors. 一种解决方法是使用interaction()从所有三个因素创建一个新的分组变量。
Interpretation of this will be awkward (depending how many factor levels you have) and I don't know if that`s meaningful at all - so be careful. 对此的解释会很尴尬（取决于您拥有多少个因子水平），我也不知道这是否有意义-因此请小心。
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