Ldot.inhom(spatstat)
Ldot.inhom()所属R语言包:spatstat
Inhomogeneous Multitype L Dot Function
非均匀多类型l的点功能
译者:生物统计家园网 机器人LoveR
描述----------Description----------
For a multitype point pattern, estimate the inhomogeneous version of the dot L function.
对于多类型的点图案,点L函数估计的不均匀版本。
用法----------Usage----------
Ldot.inhom(X, i, ...)
参数----------Arguments----------
参数:X
The observed point pattern, from which an estimate of the inhomogeneous cross type L function Li.(r) will be computed. It must be a multitype point pattern (a marked point pattern whose marks are a factor). See under Details.
所观察到的点图案,从其中的估计的非均匀交叉型L函数Li.(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)。请参阅“详细信息”下。
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:...
Other arguments passed to Kdot.inhom.
其他参数传递给Kdot.inhom。
Details
详细信息----------Details----------
This a generalisation of the function Ldot to include an adjustment for spatially inhomogeneous intensity, in a manner similar to the function Linhom.
这是一个一般化的功能Ldot包括空间非均匀的强度的调整,在同样功能Linhom。
All the arguments are passed to Kdot.inhom, which estimates the inhomogeneous multitype K function Ki.(r) for the point pattern. The resulting values are then transformed by taking L(r) = sqrt(K(r)/pi).
所有的参数被传递给Kdot.inhom,估计的非均匀多类型的K函数Ki.(r)点模式。生成的值,然后转化,通过采取L(r) = sqrt(K(r)/pi)。
值----------Value----------
An object of class "fv" (see fv.object).
类的一个对象"fv"(见fv.object)。
Essentially a data frame containing numeric columns
本质上是一个数据框包含数字的列
参数:r
the values of the argument r at which the function Li.(r) has been estimated
的参数的值的r在哪些函数Li.(r)已估计
参数:theo
the theoretical value of Li.(r) for a marked Poisson process, identical to r.
Li.(r)显着的泊松过程,理论值相同r。
together with a column or columns named "border", "bord.modif", "iso" and/or "trans", according to the selected edge corrections. These columns contain estimates of the function Li.(r) obtained by the edge corrections named.
连同一列或多列名为"border","bord.modif","iso"和/或"trans",根据选定的边修正。这些列包含的功能Li.(r)命名的边缘修正的估计。
警告----------Warnings----------
The argument i is interpreted as a level of the factor X$marks. It is converted to a character string if it is not already a character string. The value i=1 does not refer to the first level of the factor.
解释的参数i作为的因素X$marks的水平。如果它不是已经是一个字符串,它被转换为一个字符串。值i=1不是指第一级的因素。
(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----------
Statistical Inference and Simulation for Spatial Point Processes Chapman and Hall/CRC Boca Raton, 2003.
参见----------See Also----------
Ldot, Linhom, Kdot.inhom, Lcross.inhom.
Ldot,Linhom,Kdot.inhom,Lcross.inhom。
实例----------Examples----------
# Lansing Woods data[蓝星伍兹数据]
data(lansing)
lansing <- lansing[seq(1,lansing$n, by=10)]
ma <- split(lansing)$maple
lg <- unmark(lansing)
# Estimate intensities by nonparametric smoothing[估计非参数平滑的强度]
lambdaM <- density.ppp(ma, sigma=0.15, at="points")
lambdadot <- density.ppp(lg, sigma=0.15, at="points")
L <- Ldot.inhom(lansing, "maple", lambdaI=lambdaM,
lambdadot=lambdadot)
# synthetic example: type A points have intensity 50,[合成例如:键入一个点的强度为50,]
# type B points have intensity 50 + 100 * x[B型点强度50 + 100 * X]
lamB <- as.im(function(x,y){50 + 100 * x}, owin())
lamdot <- as.im(function(x,y) { 100 + 100 * x}, owin())
X <- superimpose(A=runifpoispp(50), B=rpoispp(lamB))
L <- Ldot.inhom(X, "B", lambdaI=lamB, lambdadot=lamdot)
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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