tolerance.nb(spdep)
tolerance.nb()所属R语言包：spdep
Function to construct edges based on a tolerance angle and a maximum distance
函数来构造基于公差角边缘和最大距离
译者：生物统计家园网 机器人LoveR
描述----------Description----------
This function creates an object of class nb (defined in the library spdep) containing a connexion diagram. The edges between sites are based on a tolerance angle and a maximum distance. The angle is directional; its direction is always from the bottow to the top of the screen.
这个函数创建一个对象的类nb（定义库中的spdep），包含一个联接图。站点之间的边缘是根据上的的公差角度和最大距离。的角度是有方向性的，它的方向始终是从自下而上屏幕顶部。
用法----------Usage----------
tolerance.nb(coords, unit.angle = "degrees", max.dist, tolerance, rot.angle, plot.sites=FALSE)
参数----------Arguments----------
参数：coords
A matrix or a data frame containing the X and Y coordinates of the study sites.
的基质或含在X和Y坐标的数据框的研究地点。
参数：unit.angle
Character. The measurement units in which angles are defined: either "degrees" (default) or "radians".
字符。角度的定义：无论是“度”（默认）或“弧度”的测量单位。
参数：max.dist
Numeric. The maximum distance of an edge linking two sites together.
数字。边缘连接两个站点的最大距离。
参数：tolerance
Numeric. The tolerance angle in which a site can influence another site. The angle is measured vertically and from bottom to top of the pictures after rotation of the points.
数字。的耐受性角度在哪些网站可以影响另一个站点。角度测量垂直和旋转后的点从底部到顶部的图片。
参数：rot.angle
Numeric, optional. An angle at which a set of coordinates should be rotated before creating the connexion diagram. The set of coordinates is rotated counterclockwise. Negative values will produce a clockwise rotation.
数字，可选的。的角度在哪些应该是一组坐标旋转之前创建的亲戚关系图。的一组坐标是逆时针旋转。负值将产生顺时针旋转。
参数：plot.sites
Logical (TRUE, FALSE) determining if the site should be plotted in a graphic window. This graph allows one to make sure the points are rotated in a correct direction.
逻辑（TRUE，FALSE）决定，如果该网站应被绘制在一个图形窗口。本图，能够一个确保的点是在一个正确的方向旋转。
Details
详细信息----------Details----------
Even though this function creates a connexion diagram based on a tolerance angle going from the bottom to the top of the screen, the resulting object is symmetric, meaning that a site influences another and vice versa. The final object does not represent a directional connexion network.
尽管这个函数创建一个联接图的公差角度的基础上，从底部到顶部的屏幕，所产生的对象是对称的，也就是说，一个网站的影响，反之亦然。最终的对象并不代表定向联接网络。
值----------Value----------
The function returns an object of class nb with a list of integer vectors corresponding to neighbour region numbers.
该函数返回一个类的对象nb与邻区号码对应的向量整数的列表。
警告----------Warning----------
This function was not design to handle a large number of rows in coords. To use this function for a set of coordinates with more than 1500 entries is memory intensive.
此功能被设计来处理一个大的行数coords。要使用此功能为一组坐标1500多件参赛作品，占用大量内存。
（作者）----------Author(s)----------
F. Guillaume Blanchet
参见----------See Also----------
dnearneigh, cell2nb, graph2nb, tri2nb, knn2nb
dnearneigh，cell2nb，graph2nb，tri2nb，knn2nb
实例----------Examples----------
set.seed(1)
ex.data<-cbind(runif(50),rexp(50))
### Construct object of class nb with a tolerance angle of 30 degrees and a maximum distance of 2 m.[＃＃构建对象类nb的容差角为30度，最大为2米的距离。]
nb.ex<-tolerance.nb(ex.data, unit.angle = "degrees", max.dist=1, tolerance = 30)
### Construct object of class nb with a tolerance angle of 30 degrees and a maximum distance of 2 m. The coordinates are rotated at an angle of 45 degrees counterclockwise.[＃＃构建对象类nb的容差角为30度，最大为2米的距离。坐标是逆时针方向的角度为45度的旋转。]
nb.ex2<-tolerance.nb(ex.data, unit.angle = "degrees", max.dist=1, tolerance = 30, rot.angle = 45)
### Construct object of class nb with a tolerance angle of pi/8 radians and a maximum distance of 1.5 m. The coordinates are rotated at an angle of pi/4 radians clockwise.[＃＃构造对象的类NB的公差pi / 8弧度和角度的最大距离为1.5米。坐标是pi / 4弧度顺时针方向旋转时的角度。]
nb.ex3<-tolerance.nb(ex.data, unit.angle = "radians", max.dist=1.5, tolerance = pi/8,rot.angle = -pi*2/3)
par(mfrow=c(1,3))
plot(nb.ex,ex.data,asp=1)
plot(nb.ex2,ex.data,asp=1)
plot(nb.ex3,ex.data,asp=1)
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注：
注1：为了方便大家学习，本文档为生物统计家园网机器人LoveR翻译而成，仅供个人R语言学习参考使用，生物统计家园保留版权。
注2：由于是机器人自动翻译，难免有不准确之处，使用时仔细对照中、英文内容进行反复理解，可以帮助R语言的学习。
注3：如遇到不准确之处，请在本贴的后面进行回帖，我们会逐渐进行修订。
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发表于 2012-9-30 14:46:10
