sampSurf(sampSurf)
sampSurf()所属R语言包：sampSurf
Generate Objects of Class "<a href="sampSurf-class.html">sampSurf</a>"
生成对象类“<a href="sampSurf-class.html"> sampSurf </ A>”
译者：生物统计家园网 机器人LoveR
描述----------Description----------
This is the generic definition for generating objects of class "sampSurf." There are several methods corresponding to this generic that may be found in sampSurf-methods. One of the constructor methods in particular, averts the necessity for being familiar with the other classes in the package and can simply be run from scratch, requiring only an extant "Tract" object on which to draw the sample and compute the surface. More details and examples are found in "The sampSurf Class"
这是为生成类“sampSurf的对象的通用定义。”通用，可能会发现在sampSurf-methods相应的方法有好几种。一个特别的构造方法，可避免出现熟悉的其他软件包中的类，可以简单地从头开始运行的必要性，要求只有一个现存的“Tract”对象上绘制的样品和计算表面。更多细节和例子被发现在：“sampSurf类”
用法----------Usage----------
sampSurf(object, tract, ...)
参数----------Arguments----------
参数：object
Signature object, which differs for each method.
Signature对象，不同的每个方法。
参数：tract
Signature object of class "Tract" or subclass.
签名类“Tract”或子类的对象。
参数：...
See methods.
请参见方法。
Details
详细信息----------Details----------
The generation of objects of this class depends on the signature of the method used. One common thread is that all methods require an existing object of class "Tract" or one of its subclasses to be available. This will be the grid area over which the population is to be simulated and sampling surface determined. It is often convenient to set this area up to be equal to one acre or one hectare. However, one could match each "tract" to the size of a sample plot where logs or trees have been measured in the field, for example. And there is no reason why the tract must be restricted to a smaller size, except for the limitations of computer memory. The raster package routines should help with this because they will store large rasters (tracts) on disk, but I have not had the chance to test this out sufficiently yet. In any case, one can start from scratch and make all of the intervening objects necessary to create a sampling surface with the appropriate constructor method. Alternatively, one can bypass all the intermediate steps and use the constructor that takes the number of individual stems and a tract object, and let it do all of the work. These are both explained
这个类的对象的生成依赖于所使用的方法的签名。一个共同点是，所有的方法都需要一个现有的类的对象“Tract”或它的子类，可。这将是该人口是能够被模拟以及采样表面确定的网格区域。常常是方便将此区域设置为等于一个英亩或1公顷的。但是，人们可以相互匹配的“道”的样地在该领域进行了测量，例如原木或树木的大小。为什么道必须被限制到一个较小的尺寸，除了计算机内存的限制，没有任何理由。这一点，因为raster包例程应该帮助他们将存储在磁盘上的大栅格（大港），但我还没有机会尚未充分测试了这一点。在任何情况下，我们可以从头开始，所有需要适当的构造方法创建一个采样表面的对象。另外，我们可以绕过所有的中间步骤，使用个人茎数和一大片对象的构造函数，并让它做所有的工作。这些都是解释
值----------Value----------
A valid object of class "sampSurf."
一个有效的类的对象“sampSurf。”
（作者）----------Author(s)----------
Jeffrey H. Gove
参考文献----------References----------
参见----------See Also----------
sampSurf-package, sampSurf-class, sampSurf-methods
sampSurf-package，sampSurf-class，sampSurf-methods
实例----------Examples----------
#[]
# create a sampling surface with 3 logs using the "sausage" method...[创建一个的采样表面与log使用的“香肠”的方法...]
#[]
tr = Tract(c(x=50,y=50), cellSize=0.5)
btr = bufferedTract(10, tr)
ssSA = sampSurf(3, btr, iZone = 'sausageIZ', plotRadius=3,
buttDiam=c(30,50), startSeed=1001)
plot(ssSA, axes=TRUE)
summary(ssSA)
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。
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发表于 2012-9-29 22:07:29
