Trees(SAFD)
Trees()所属R语言包：SAFD
Tree dataset
树数据集
译者：生物统计家园网 机器人LoveR
描述----------Description----------
Trees is a list containing three sublists, each of which consists of a sample of trapezoidal fuzzy numbers. The data corresponds to the quality of the three main species of trees in Asturias, namely birch (Betula celtiberica), sessile oak (Quercus petraea) and rowan (Sorbus aucuparia). Within a study about the progress of reforestation in a given area of Asturias (Spain) the INDUROT institute (University of Oviedo) has collected a sample of n1=133 birches, n2=109 sessile oaks and n3=37 rowans. Each tree was assigned a trapezoidal fuzzy number that models the experts subjective judgements/perceptions of the tree quality on a scale from 0 to 5 (0 meaning very bad quality to 5 meaning very good quality). Thereby the 1-cut is the interval in which the expert thinks the quality is contained and the support (0-cut) is the interval in which the expert is absolutely sure the quality is contained.
Trees是一个列表，其中包含三个子表，其中包括梯形模糊数的样本。的数据对应的三个主要品种的树木即桦木（桦celtiberica），无柄橡木（栎佩特拉行省）和花楸（欧洲花楸）在阿斯图里亚斯，以质量。在一个给定的区域（西班牙）INDUROT研究所（奥维耶多大学）在一项研究的进展情况，再造林为n1 = 133桦树已经收集了样品，N2 = 109的无柄橡树和n3 = 37 rowans。每棵树被分配了一个梯形模糊数模型的专家主观判断的规模从0到5（0表示5表示非常糟糕的质量，质量非常好）/树质量的看法。因此，1切的时间间隔中，专家认为，质量是包含和支持（0切）的专家，绝对保证质量包含的时间间隔。
用法----------Usage----------
data(Trees)
格式----------Format----------
A list with three sublist, each of which contains trapezoidal fuzzy numbers.
甲有三个子列表的列表，其中每个都包含梯形模糊数。
Details
详细信息----------Details----------
See Reference
见参考文献
参考文献----------References----------
Applications to the analysis of fuzzy- and real-valued data, Fuzzy Sets and Systems, 160(3), pp. 344-356 (2009)
实例----------Examples----------
data(Trees)
M<-Mmean(Trees[[1]],1)
head(M)
M<-Mmean(Trees[[1]],1)
head(M)
Mmean(Trees[[1]],1)
head(M)
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。
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发表于 2012-9-29 21:31:20
