linearpcf(spatstat)
linearpcf()所属R语言包:spatstat
Linear Pair Correlation Function
线性对相关函数
译者:生物统计家园网 机器人LoveR
描述----------Description----------
Computes an estimate of the linear pair correlation function for a point pattern on a linear network.
计算线性网络上的一个点的图案的线性对相关函数的估计。
用法----------Usage----------
linearpcf(X, r=NULL, ..., correction="Ang")
参数----------Arguments----------
参数:X
Point pattern on linear network (object of class "lpp").
点线性网络模式(类的对象"lpp"“)。
参数:r
Optional. Numeric vector of values of the function argument r. There is a sensible default.
可选。数字矢量值函数的参数r。有一个合理的默认。
参数:...
Arguments passed to density.default to control the smoothing.
参数传递给density.default控制的平滑。
参数:correction
Geometry correction. Either "none" or "Ang". See Details.
几何校正。无论是"none"或"Ang"。查看详细信息。
Details
详细信息----------Details----------
This command computes the linear pair correlation function from point pattern data on a linear network.
该命令计算的线性对相关功能点的图形数据的线性网络。
The pair correlation function is estimated from the shortest-path distances between each pair of data points, using the fixed-bandwidth kernel smoother density.default, with a bias correction at each end of the interval of r values. To switch off the bias correction, set endcorrect=FALSE.
对相关函数的估计从每对数据点之间的最短路径的距离,使用固定带宽的内核平滑density.default,r值的时间间隔的每一端与一个偏置校正。要关闭偏置校正,设置endcorrect=FALSE。
If correction="none", the calculations do not include any correction for the geometry of the linear network. The result is an estimate of the first derivative of the network K function defined by Okabe and Yamada (2001).
如果correction="none",计算不包括线性网络的几何形状的任何校正。其结果是一个网络K由冈部和Yamada(2001)定义的函数的一阶导数的估计。
If correction="Ang", the pair counts are weighted using Ang's correction (Ang, 2010). The result is an estimate of the pair correlation function in the linear network.
如果correction="Ang",对数进行加权用李安的修正(李安,2010)。其结果是一个线性网络中对相关函数的估计。
值----------Value----------
Function value table (object of class "fv").
函数值表(类的对象"fv")。
(作者)----------Author(s)----------
Ang Qi Wei <a href="mailto:aqw07398@hotmail.com">aqw07398@hotmail.com</a> and
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>
参考文献----------References----------
on a linear network. MSc thesis, University of Western Australia.
Geometrically corrected second-order analysis of events on a linear network, with applications to ecology and criminology. To appear in Scandinavian Journal of Statistics.
its computational implementation. Geographical Analysis 33, 271-290.
参见----------See Also----------
linearK, linearpcfinhom, lpp
linearK,linearpcfinhom,lpp
实例----------Examples----------
data(simplenet)
X <- rpoislpp(5, simplenet)
linearpcf(X)
linearpcf(X, correction="none")
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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