pcfcross(spatstat)
pcfcross()所属R语言包：spatstat
Multitype pair correlation function (cross-type)
多类型，对相关功能（十字型）
译者：生物统计家园网 机器人LoveR
描述----------Description----------
Calculates an estimate of the cross-type pair correlation function for a multitype point pattern.
计算一个多类型的点图案的十字型对相关函数的估计。
用法----------Usage----------
pcfcross(X, i, j, ...)
参数----------Arguments----------
参数：X
The observed point pattern, from which an estimate of the cross-type pair correlation function g[i,j](r) will be computed. It must be a multitype point pattern (a marked point pattern whose marks are a factor).
观测点的模式，从估计的十字型对相关功能g[i,j](r)将被计算。它必须是一个多类型的点模式（一个标记点图案的标记是一个因素）。
参数：i
The type (mark value) of the points in X from which distances are measured. A character string (or something that will be converted to a character string). Defaults to the first level of marks(X).
X距离的测量点的类型（标记值）。一个字符串（或东西都将被转换为一个字符串）。默认的第一级marks(X)。
参数：j
The type (mark value) of the points in X to which distances are measured. A character string (or something that will be converted to a character string). Defaults to the second level of marks(X).
距离的测量点X的类型（标记值）。一个字符串（或东西都将被转换为一个字符串）。默认的第二个层次的marks(X)。
参数：...
Arguments passed to pcf.ppp.
传递参数到pcf.ppp。
Details
详细信息----------Details----------
The cross-type pair correlation function is a generalisation of the pair correlation function pcf to multitype point patterns.
十字型对相关函数是一个泛化的对相关函数pcf的多类型的点图案。
For two locations x and y separated by a distance r, the probability p(r) of finding a point of type i at location x and a point of type j at location y is
对于两个位置x和y分开的距离r，概率p(r)找到的点的类型i在位置x点类型j的位置y
where lambda[i] is the intensity of the points of type i. For a completely random Poisson marked point process, p(r) = lambda[i] * lambda[j] so g[i,j](r) = 1. Indeed for any marked point pattern in which the points of type i are independent of the points of type j, the theoretical value of the cross-type pair correlation is g[i,j](r) = 1.
lambda[i]是的强度类型i点。对于一个完全随机的泊松标记点过程中，p(r) = lambda[i] * lambda[j]所以g[i,j](r) = 1的。事实上，任何标记点模式，其中的点的类型i是独立的点的类型j，十字型对相关的理论值是g[i,j](r) = 1。
For a stationary multitype point process, the cross-type pair correlation function between marks i and j is formally defined as
对于静止的多类型点的过程中，十字型对相关函数标记之间i和j被正式定义为
where K[i,j]'(r) is the derivative of the cross-type K function K[i,j](r). of the point process. See Kest for information about K(r).
K[i,j]'(r)是衍生工具的十字型K函数K[i,j](r)。点过程。见Kest：信息K(r)的。
The command pcfcross computes a kernel estimate of the cross-type pair correlation function between marks i and j. It uses pcf.ppp to compute kernel estimates of the pair correlation functions for several unmarked point patterns, and uses the bilinear properties of second moments to obtain the cross-type pair correlation.
命令pcfcross计算核估计的十字型对相关函数标记之间i和j。它使用了pcf.ppp计算内核几个未标记的点图案的一对相关函数的估计，并且使用双线性性质的第二时刻获取的十字型的对相关。
See pcf.ppp for a list of arguments that control the kernel estimation.
pcf.ppp控制的核估计的参数的列表。
The companion function pcfdot computes the corresponding analogue of Kdot.
伴侣功能pcfdot计算相应的模拟Kdot。
值----------Value----------
An object of class "fv", see fv.object, which can be plotted directly using plot.fv.
类的一个对象"fv"，fv.object，它可以绘制直接使用plot.fv的。
Essentially a data frame containing columns
本质上是一个数据框包含多个列
参数：r
the vector of values of the argument r at which the function g[i,j] has been estimated
的参数的值的矢量r在哪些函数g[i,j]已估计
参数：theo
the theoretical value g[i,j](r) = r for independent marks.
理论值g[i,j](r) = r独立的标记。
together with columns named "border", "bord.modif", "iso" and/or "trans", according to the selected edge corrections. These columns contain estimates of the function g[i,j] obtained by the edge corrections named.
一起列名为"border"，"bord.modif"，"iso"和/或"trans"，根据选定的边修正。这些列包含的功能g[i,j]命名的边缘修正的估计。
（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>
参见----------See Also----------
Mark connection function markconnect.
标记连接功能markconnect。
Multitype pair correlation pcfdot.
多类型，对相关pcfdot。
Pair correlation pcf,pcf.ppp.
对相关pcf，pcf.ppp。
Kcross
Kcross
实例----------Examples----------
data(amacrine)
p <- pcfcross(amacrine, "off", "on")
p <- pcfcross(amacrine, "off", "on", stoyan=0.1)
plot(p)
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 13:54:24
