vegetarian-package(vegetarian)
vegetarian-package()所属R语言包：vegetarian
Jost Diversity Measures for Community Data
乔斯特社区数据的多样性措施
译者：生物统计家园网 机器人LoveR
描述----------Description----------
Details
详细信息----------Details----------
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The core of the vegetarian library is the d function, which calculates the basic alpha, beta, and gamma diversity 'numbers equivalents' from community data. H uses d to calculate the standard diversity indices. The functions similarity, M.homog, Rel.homog, and turnover call d to compare diversity across communities. use sim.table and/or sim.groups to produce multiple pairwise similarity comparisons among many sample sites. All functions can output standard errors by calling bootstrap internally. For more detailed bootstrapping outputs, the user can call bootstrap seperately. The function normalize.rows is called by d to convert count data into frequencies. The simple function, p.q.sum is called internally as core part of the diversity calculations, and is probably of little use to the average user, though it may be used to create more complex diversity measures. This update corrects an error in the similarity function and boostrap standard error estimates from earlier versions.
素食主义者库的核心是d功能，计算基本的α，β和伽玛多样性“等价物”，从社区数据。 H使用d计算标准的多样性指数。的功能similarity，M.homog，Rel.homog和turnoverd比较整个社区的多样性。使用sim.table和/或sim.groups产生许多采样点的多个两两之间的相似性比较。所有的功能都可以通过调用bootstrap内部标准错误输出。如需更详细的引导输出，用户可以调用“bootstrap分开。被称为normalize.rows数数据转换为频率的功能d。简单的功能，p.q.sum被称为内部的多样性计算的核心部分，并很可能对普通用户没有多大用处的，但它可以被用来创建更复杂的多样性的措施。此更新修正similarity功能和自举标准误差估计从早期版本中的错误。
（作者）----------Author(s)----------
Noah Charney, Sydne Record
参考文献----------References----------
Chao, A, L. Jost, S. C. Chiang, Y.-H Jiang, R. L. Chazdon. 2008. A two-stage probabilistic approach to multiple-community similarity indices. Biometrics 64: 1178-1186.
Jost, L. 2006. Entropy and diversity. Oikos 113(2): 363-375.
Jost, L. 2007. Partitioning diversity into independent alpha and beta components. Ecology 88(10): 2427-2439.
Hill, M. 1973. Diversity and evenness: A unifying notation and its consequences. Ecology 54: 427-432.
实例----------Examples----------
data(simesants)
d(simesants[,-1], boot=TRUE)
#remove column with site names [与站点名称删除列]
#calculates alpha diversity of entire data-set with standard error[计算α多样性整个数据集的标准误差]
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注：
注1：为了方便大家学习，本文档为生物统计家园网机器人LoveR翻译而成，仅供个人R语言学习参考使用，生物统计家园保留版权。
注2：由于是机器人自动翻译，难免有不准确之处，使用时仔细对照中、英文内容进行反复理解，可以帮助R语言的学习。
注3：如遇到不准确之处，请在本贴的后面进行回帖，我们会逐渐进行修订。
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发表于 2012-10-1 15:19:52
