Linhom(spatstat)
Linhom()所属R语言包:spatstat
L-function
L-函数
译者:生物统计家园网 机器人LoveR
描述----------Description----------
Calculates an estimate of the inhomogeneous version of the L-function (Besag's transformation of Ripley's K-function) for a spatial point pattern.
计算版本的L功能(Besag的改造里普利K功能)的非齐次估计的空间点格局。
用法----------Usage----------
Linhom(...)
参数----------Arguments----------
参数:...
Arguments passed to Kinhom to estimate the inhomogeneous K-function.
参数传递给Kinhom估计的不均匀K-函数。
Details
详细信息----------Details----------
This command computes an estimate of the inhomogeneous version of the L-function for a spatial point pattern
此命令计算的估计值的不均匀版本L功能空间点图案
The original L-function is a transformation (proposed by Besag) of Ripley's K-function,
原始的L功能是这样一种变换(建议由Besag)里普利K功能,
where K(r) is the Ripley K-function of a spatially homogeneous point pattern, estimated by Kest.
K(r)是:里普利K功能的空间均匀的点模式,估计Kest。
The inhomogeneous L-function is the corresponding transformation of the inhomogeneous K-function, estimated by Kinhom. It is appropriate when the point pattern clearly does not have a homogeneous intensity of points. It was proposed by Baddeley, Moller and Waagepetersen (2000).
的不均匀L功能的不均匀K功能相应的改造,估计Kinhom。这是适当的,当清楚的点图案的点不具有均匀的强度。有人提议通过巴德利,穆勒和Waagepetersen的的(2000年)。
The command Linhom first calls Kinhom to compute the estimate of the inhomogeneous K-function, and then applies the square root transformation.
命令Linhom第一次调用Kinhom来计算的不均匀K-函数的估计,然后再应用的平方根转换。
For a Poisson point pattern (homogeneous or inhomogeneous), the theoretical value of the inhomogeneous L-function is L(r) = r. The square root also has the effect of stabilising the variance of the estimator, so that L is more appropriate for use in simulation envelopes and hypothesis tests.
对于泊松点模式(均匀或不均匀),理论值的不均匀L功能是:L(r) = r。稳定估计的方差的平方根也有效果,从而使L是更适合于使用在模拟信封和假设检验。
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 L has been estimated
的参数的值的矢量r在哪些函数L已估计
参数:theo
the theoretical value L(r) = r for a stationary Poisson process
理论值L(r) = r平稳泊松过程
together with columns named "border", "bord.modif", "iso" and/or "trans", according to the selected edge corrections. These columns contain estimates of the function L(r) 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L(r)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>
参考文献----------References----------
Non- and semiparametric estimation of interaction in inhomogeneous point patterns. Statistica Neerlandica 54, 329–350.
参见----------See Also----------
Kest, Lest, Kinhom, pcf
Kest,Lest,Kinhom,pcf
实例----------Examples----------
data(japanesepines)
X <- japanesepines
L <- Linhom(X, sigma=0.1)
plot(L, main="Inhomogeneous L function for Japanese Pines")
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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