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R语言 treecm包 getPlinthForce()函数中文帮助文档(中英文对照)

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发表于 2012-10-1 11:47:50 | 显示全部楼层 |阅读模式
getPlinthForce(treecm)
getPlinthForce()所属R语言包:treecm

                                        Computes the force on the plinth on the ground
                                         在地面上计算,底座上的力

                                         译者:生物统计家园网 机器人LoveR

描述----------Description----------

To stabilize the tree a steel cable is connected from an anchor point on the tree to a plinth on the ground. The function computes the force on the plinth (needed to choose the appropriate steel cable and to build the plinth itself) and the maximum security azimuth (the angle relative to the North from the tree base). Force is computed by comparing the moment of the tree and the moment of the anchor, whose arm is the vector from tree base to the anchor point. The anchor point is defined as the distance from tree base, along the stem. Note that this distance equals anchor height only when the stem is perfectly vertical and straight.
为了稳定树的钢电缆连接从树的定位点上,在地面上的底座。该函数计算力的底座(需要选择适当的钢线,并建立底座本身)和最高的安全性方位(角度相对于北国的树基)。力的计算方法是比较树的那一刻锚的胳膊是从树基向量的锚点的那一刻。锚固点被定义为从树碱的距离,沿着阀杆。请注意,这个距离等于锚的高度只有当干完全垂直和直的。


用法----------Usage----------


  getPlinthForce(l.stem, d, logs, treeMoment, CM)



参数----------Arguments----------

参数:l.stem
the distance from tree base to anchor point, along the stem
树碱基的距离锚点,沿神经干


参数:d
the length of the cable (in metres)
的电缆的长度(米)的


参数:logs
a data frame holding the selected logs (see logPathSelection)
选定的log数据框(见logPathSelection)


参数:treeMoment
the moment of the tree as computed by calcMoment
树的那一刻计算的calcMoment


参数:CM
an object of CM class
一个CM类的对象


值----------Value----------

a named list of 6 elements:
6个元素命名列表:


参数:force
the force in Newton on the plinth  <tr valign="top"><td>distanceOnGround</td>
在牛顿的力上的底座<tr valign="top"> <TD>distanceOnGround</ TD>

the distance from tree base to the plinth
从树基底座的距离


参数:anchorAlongStem
the distance from tree base to the anchor (ie l.stem)  <tr valign="top"><td>cableLength</td>
的距离从树碱基锚(即l.stem)<tr valign="top"> <TD> cableLength </ TD>

the length of the cable (ie d)
电缆的长度(即d)


参数:anchorHeight
true height of the anchor over ground  <tr valign="top"><td>azimuth</td>
地锚的真实身高<tr valign="top"> <TD> azimuth</ TD>

the azimuth of the plint relative to the tree base
方位角的PLINT相对树碱基


注意----------Note----------

The function is vectorized both for anchor distance from tree base (l.stem parameter) and for cable length (d). It is not possible to pass invalid l.stem values, see anchorRange.
的功能是量化的锚距离树碱基(l.stem参数),电缆长度(d“)。这是不可能通过无效l.stem值,请参阅anchorRange。


参见----------See Also----------

Other Stabilization: anchorRange, centreOfMassAngle, centreOfMassModulus, logPathSelection, toCartesianXYZ
其他的稳定:anchorRange,centreOfMassAngle,centreOfMassModulus,logPathSelection,toCartesianXYZ


实例----------Examples----------


library(treecm)
data(stonePine1TreeData)
vectors <- treeVectors(stonePine1TreeData)
CM <- centreOfMass(vectors)
treeMoment <- buildTreeMomentObject(
  centreOfMassModulus(CM)
  , treeTotalBiomass(stonePine1TreeData)
  , centreOfMassAngle(CM)
  )
treeMoment <- calcMoment(treeMoment)
logs <- logPathSelection(stonePine1TreeData)
plinth <- data.frame(getPlinthForce(10, 20, logs, getMoment(treeMoment), CM))

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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