Webb(1)Chao – the Chao1 estimator ( http://www.mothur.org/wiki/Chao )；是用chao1 算法估计样品中所含OTU 数目的指数，chao1 在生态学中常用来估计物种总数，由Chao (1984) 最早提出；本次分析使用计算公式如下： （2）Ace – the ACE estimator ( http://www.mothur.org/wiki/Ace )；用来估计群落中OTU 数目的指数，由Chao 提出，是 … WebbThese include the ‘ace’, ‘Chao1’, ‘Hill’, and ‘Observed’ richness measures. See details for more information and references. The richness is calculated per sample. This is a standard index in community ecology, and it provides an estimate of the number of unique species in the community.
estimate_richness: Summarize alpha diversity in …
WebbLet* S 0**be*the*number*of*taxaobserved*atleastonce* in*a sample,* *****a 0**the*unknown*number*of*species*presentin*the*community*butnotobserved.* 1.OTUrichness: *R ... Webbalpha多样性指数主要包括：Chao1、Ace、Shannon、Simpson、Richness、goods_coverage、Pielou、invsimpson等等。 Question 2：alpha多样性指数的含义？ … triumph songs list
plot_richness function - RDocumentation
WebbShannon or Shannon--Weaver (or Shannon--Wiener) index is defined as H ′ = − ∑ i p i log b p i, where p i is the proportional abundance of species i and b is the base of the logarithm. It is most popular to use natural logarithms, but some argue for base b = 2 (which makes sense, but no real difference). Both variants of Simpson's index ... WebbDiversity index, one of "shannon" , "simpson" or "invsimpson". MARGIN. Margin for which the index is computed. base. The logarithm base used in shannon. inverse. Use inverse Simpson similarly as in diversity (x, "invsimpson"). groups. A grouping factor: if given, finds the diversity of communities pooled by the groups. WebbEasy Metagenome Pipeline. Contribute to YongxinLiu/EasyMetagenome development by creating an account on GitHub. triumph souffelweyersheim