dummy.ppm(spatstat)
dummy.ppm()所属R语言包:spatstat
Extract Dummy Points Used to Fit a Point Process Model
提取一个点过程模型来拟合虚拟点
译者:生物统计家园网 机器人LoveR
描述----------Description----------
Given a fitted point process model, this function extracts the "dummy points" of the quadrature scheme used to fit the model.
此功能在一个装有点过程模型,提取的正交方案,以适应模型的假点“。
用法----------Usage----------
dummy.ppm(object, drop=FALSE)
参数----------Arguments----------
参数:object
fitted point process model (an object of class "ppm").
装点过程模型(对象类"ppm"“)。
参数:drop
Logical value determining whether to delete dummy points that were not used to fit the model.
确定是否删除不使用的虚拟点,以适应模型中的逻辑值。
Details
详细信息----------Details----------
An object of class "ppm" represents a point process model that has been fitted to data. It is typically produced by the model-fitting algorithm ppm.
一个对象的类"ppm"的表示点已安装的过程模型,数据。它通常所产生的模型的拟合算法ppm。
The maximum pseudolikelihood algorithm in ppm approximates the pseudolikelihood integral by a sum over a finite set of quadrature points, which is constructed by augmenting the original data point pattern by a set of “dummy” points. The fitted model object returned by ppm contains complete information about this quadrature scheme. See ppm or ppm.object for further information.
在ppm的的最大pseudolikelihood算法由正交的点,这是通过增大由“虚拟”的点的一组原始数据点图案构成的有限集合的总和超过整体的pseudolikelihood相若。拟合的模型对象返回ppm这个积分方案包含完整的信息。 ppm或ppm.object进一步的信息。
This function dummy.ppm extracts the dummy points of the quadrature scheme. A typical use of this function would be to count the number of dummy points, to gauge the accuracy of the approximation to the exact pseudolikelihood.
此功能dummy.ppm中提取的虚拟点的正交计划。一个典型的使用这个功能将是数一数的假人点,测量的准确度,近似的确切pseudolikelihood。
It may happen that some dummy points are not actually used in fitting the model (typically because the value of a covariate is NA at these points). The argument drop specifies whether these unused dummy points shall be deleted (drop=TRUE) or retained (drop=FALSE) in the return value.
它可能发生,实际上不使用一些虚拟的点拟合模型(通常因为协变量的值是NA在这些点处)。这些未使用的虚拟点是否应删除(drop)或保留(drop=TRUE)的返回值中指定的参数drop=FALSE。
See ppm.object for a list of all operations that can be performed on objects of class "ppm".
见ppm.object的列表可以执行的所有操作对象的类"ppm"。
值----------Value----------
A point pattern (object of class "ppp").
点模式(类的对象"ppp")。
(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----------
ppm.object, ppp.object, ppm
ppm.object,ppp.object,ppm
实例----------Examples----------
data(cells)
fit <- ppm(cells, ~1, Strauss(r=0.1))
X <- dummy.ppm(fit)
X$n
# this is the number of dummy points in the quadrature scheme[这是假人点的数量在正交计划]
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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