gridweights(spatstat)
gridweights()所属R语言包：spatstat
Compute Quadrature Weights Based on Grid Counts
基于网格计数的权重计算正交
译者：生物统计家园网 机器人LoveR
描述----------Description----------
Computes quadrature weights for a given set of points, using the “counting weights” for a grid of rectangular tiles.
计算正交的权重的一组给定的点，使用的“计数的权重”为一个网格的矩形砖。
用法----------Usage----------
gridweights(X, ntile, ..., window=NULL, verbose=FALSE, npix=NULL, areas=NULL)
参数----------Arguments----------
参数：X
Data defining a point pattern.
数据定义一个点的模式。
参数：ntile
Number of tiles in each row and column of the rectangular grid. An integer vector of length 1 or 2.
在每一行和列的矩形网格中的瓦片数。的矢量的长度为1或2的整数。
参数：...
Ignored.
忽略。
参数：window
Default window for the point pattern
点模式的默认窗口
参数：verbose
Logical flag. If TRUE, information will be printed about the computation of the grid weights.
逻辑标志。如果TRUE，信息将被打印的网格权重计算。
参数：npix
Dimensions of pixel grid to use when computing a digital approximation to the tile areas.
计算时使用的数字近似的瓷砖领域的像素网格的尺寸。
参数：areas
Vector of areas of the tiles, if they are already known.
向量的区域的瓷砖，如果他们已经知道。
Details
详细信息----------Details----------
This function computes a set of quadrature weights for a given pattern of points (typically comprising both “data” and 'dummy” points). See quad.object for an explanation of quadrature weights and quadrature schemes.
该函数计算的一组正交的权重，对于一个给定的图案的点（通常包括“数据”和“伪”点）。见quad.object的解释正交权和正交的计划。
The weights are computed by the “counting weights” rule based on a regular grid of rectangular tiles. First X and (optionally) window are converted into a point pattern object. Then the bounding rectangle of the window of the point pattern is divided into a regular ntile[1] * ntile[2] grid of rectangular tiles. The weight attached to a point of X is the area of the tile in which it lies, divided by the number of points of X lying in that tile.
权重计算的“计算权重”的规则，根据规则的网格矩形砖。第一个X和（可选的）window被转换成点模式对象。然后，窗口的边界矩形的点模式分为定期ntile[1] * ntile[2]格的矩形砖。的重量连接到一个点X是瓷砖它在于，X趴在该瓷砖的点的数目除以面积。
For non-rectangular windows the tile areas are currently calculated by approximating the window as a binary mask. The accuracy of this approximation is controlled by npix, which becomes the argument dimyx of as.mask.
对于非矩形窗口的瓷砖区域，当前窗口中的二进制掩码来近似计算。这种近似的精度控制npix，成为参数dimyxas.mask。
值----------Value----------
Vector of nonnegative weights for each point in X.
非负的权重向量中的每个点X。
（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----------
quad.object, dirichlet.weights
quad.object，dirichlet.weights
实例----------Examples----------
Q <- quadscheme(runifpoispp(10))
X <- as.ppp(Q) # data and dummy points together[数据和虚拟点]
w <- gridweights(X, 10)
w <- gridweights(X, c(10, 10))
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 13:32:22
