create.geo.objects(SpatialEpi)
create.geo.objects()所属R语言包:SpatialEpi
Create geographical objects to be used in bayes.cluster function.
创建GEO对象中要使用bayes.cluster功能。
译者:生物统计家园网 机器人LoveR
描述----------Description----------
This internal function creates the geographical objects needed to run the Bayesian cluster detection method in bayes.cluster. Specifically it creates all single zones based data objects, where single zones are the zones defined by Kulldorff (1997).
这个内部函数创建的GEO对象需要运行的贝叶斯的聚类检测方法bayes.cluster。具体来说,它会创建所有的单区为基础的数据对象,其中单区是区域定义的Kulldorff(1997)。
用法----------Usage----------
create.geo.objects(max.prop, pop, centroids, sp.obj, area = NULL)
参数----------Arguments----------
参数:max.prop
maximum proportion of study region's population each single zone can contain
研究区的人口比例最大单区可以包含
参数:pop
vector of length n of the population of each area
向量的长度n每个区域的人口
参数:centroids
an n x 2 table of the (x,y)-coordinates of the area centroids. The coordinate system must be grid-based
n x 2表中的(x,y)的坐标的区域的质心。基于网格的坐标系统必须
参数:sp.obj
an object of class SpatialPolygons (See SpatialPolygons-class) representing the study region
研究区域的对象类SpatialPolygons(见SpatialPolygons级)
参数:area
geographic area of each of the n areas. If not specified, this function will compute them based on sp.obj
n领域的每个GEO区域。如果没有指定,该函数将计算的基础上sp.obj
值----------Value----------
参数:overlap
a list with two elements: 1. presence which lists for each areas all the single zones it is present in and 2. cluster_list for each single zone its component areas
一个有两个元素的列表:这是目前在和1. presence 2. cluster_list列出了各个区域的所有单区每个单独的区域,其组件领域
参数:cluster.coords
n.zones x 2 matrix of the centering and radial area of each single zone
n.zones x 2矩阵的定心和径向每个单个区域的面积
参数:areaz
vector of the geographic surface area of each single zone
向量的表面积的每一单个区域的GEO
(作者)----------Author(s)----------
Albert Y. Kim
参考文献----------References----------
参见----------See Also----------
latlong2grid, zones
latlong2grid,zones
实例----------Examples----------
data(pennLC)
max.prop <- 0.15
pop <- tapply(pennLC$data$population, pennLC$data$county, sum)
centroids <- latlong2grid(pennLC$geo[, 2:3])
map <- pennLC$spatial.polygon
output <- create.geo.objects(max.prop, pop, centroids, map)
## number of single zones[#号单区]
nrow(output$cluster.coords)
length(output$areaz)
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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