pool.rat(spatstat)
pool.rat()所属R语言包：spatstat
Pool Data from Several Ratio Objects
从几个比对象池数据
译者：生物统计家园网 机器人LoveR
描述----------Description----------
Pool the data from several ratio objects (objects of class "rat") and compute a pooled estimate.
游泳池几个的比率对象（对象类"rat"），并计算汇总估计的数据。
用法----------Usage----------
## S3 method for class 'rat'
pool(...)
参数----------Arguments----------
参数：...
Objects of class "rat".
类"rat"的对象。
Details
详细信息----------Details----------
The function pool is generic. This is the method for the class "rat" of ratio objects. It is used to combine several estimates of the same quantity when each estimate is a ratio.
函数pool是通用的。这是类"rat"比对象的方法。每个估计值是一个比率时，它是用来结合几个相同的数量的估计。
Each of the arguments ... must be an object of class "rat" representing a ratio object (basically a numerator and a denominator; see rat). We assume that these ratios are all estimates of the same quantity.
每个参数...必须是一个对象的类"rat"的的比率对象（基本上是一个分子和分母;看到rat）。我们假设，这些比率都是相同数量的估计。
If the objects are called R[1], …, R[n] and if R[i] has numerator Y[i] and denominator X[i], so that notionally R[i] = Y[i]/X[i], then the pooled estimate is the ratio-of-sums estimator
如果对象被称为R[1], …, R[n]如果R[i]分子Y[i]和分母X[i]，因此，理论上R[i] = Y[i]/X[i]，然后汇总估计比率的款项估计
The standard error of R is computed using the delta method as described in Baddeley et al. (1993) or Cochran (1977, pp 154, 161).
R标准的错误使用增量方法计算所描述的巴德利等。 （1993年）和科克伦（1977，154，161页）。
This calculation is implemented only for certain classes of objects where the arithmetic can be performed.
此计算实现为只为某些类别的对象可以执行的算术。
This calculation is currently implemented only for objects which also belong to the class "fv" (function value tables). For example, if Kest is called with argument ratio=TRUE, the result is a suitable object (belonging to the classes "rat" and "fv").
这种计算是目前实施的对象，这也属于类"fv"（函数值表）。例如，如果Kest调用参数ratio=TRUE，其结果是一个合适的对象（属于类"rat"和"fv"）。
Warnings or errors will be issued if the ratio objects ... appear to be incompatible. However, the code is not smart enough to decide whether it is sensible to pool the data.
如果比对象...似乎是不相容的，会发出警告或错误。但是，代码是没有足够的智慧来决定它是否是明智的做法池的数据。
值----------Value----------
An object of the same class as the input.
作为输入的相同的类的一个目的。
（作者）----------Author(s)----------
Adrian Baddeley
<a href="mailto:Adrian.Baddeley@csiro.au">Adrian.Baddeley@csiro.au</a>
<a href="http://www.maths.uwa.edu.au/~adrian/">http://www.maths.uwa.edu.au/~adrian/</a>
and Rolf Turner
<a href="mailto:r.turner@auckland.ac.nz">r.turner@auckland.ac.nz</a>
参考文献----------References----------
Analysis of a three-dimensional point pattern with replication. Applied Statistics 42, 641–668.
Sampling techniques, 3rd edition. New York: John Wiley and Sons.
参见----------See Also----------
rat, pool, Kest
rat，pool，Kest
实例----------Examples----------
K1 <- Kest(runifpoint(42), ratio=TRUE, correction="iso")
K2 <- Kest(runifpoint(42), ratio=TRUE, correction="iso")
K3 <- Kest(runifpoint(42), ratio=TRUE, correction="iso")
K <- pool(K1, K2, K3)
plot(K, pooliso ~ r, shade=c("hiiso", "loiso"))
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 2012-9-30 13:59:06
