whichtank(scuba)
whichtank()所属R语言包：scuba
Which Tanks are Used during a Dive
潜水过程中使用了坦克
译者：生物统计家园网 机器人LoveR
描述----------Description----------
Determine which tank of breathing gas is used at each time point during a dive.
确定用于在每个时间点在潜水呼吸气体罐。
用法----------Usage----------
whichtank(d)
whichtank(d) <- value
参数----------Arguments----------
参数：d
The dive (an object of class "dive").
潜水（一个类的对象"dive"“）。
参数：value
Vector of integers or character strings identifying which tank of breathing gas is used at each time point.
整数或字符串识别呼吸气体的罐是在每个时间点使用的向量。
Details
详细信息----------Details----------
An object of class "dive" represents a scuba dive, including information about depth, time and gas breathed at each stage of the dive. These objects are created by the function dive.
一个对象的类"dive"的代表潜水，包括深度信息，在每个阶段的潜水时间和气体吸入。创建这些对象的功能dive。
A dive object has a tank list which is a list of the tanks of breathing gas that were used (or were available to be used) during the dive. The function tanklist returns this list.
潜水对象，这是一个列表，使用（或可使用）在潜水过程中的呼吸气体的坦克坦克列表。函数tanklist返回此列表。
The selection of tanks, i.e. which tank is actually used at each stage of the dive, is specified by whichtank. The command whichtank(d) returns a vector of integers or character strings, identifying which tank in the tank list is in use at each waypoint during the dive. That is, whichtank(d)[i] is the tank in use at the ith waypoint during the dive.
坦克，即罐实际使用的潜水在每个阶段，选择指定的whichtank。命令whichtank(d)返回一个向量的整数或字符串，确定坦克在坦克列表是在潜水过程中使用的每个航点。也就是说，whichtank(d)[i]是坦克的使用在i在潜水过程中的个航点。
The command whichtank(d) <- value will change the selection of tanks used at each stage during the dive. Here value should be a vector of integers or character strings identifying tanks in the tank list, and the length of value should be equal to the length of the vectors depths.dive(d) and depths.dive(d).
命令whichtank(d) <- value将改变选择在潜水过程中每个阶段使用的坦克。这里value应该是一个矢量的整数或字符串识别水箱列表中的坦克，和value的长度应该是相等的长度的矢量depths.dive(d)和depths.dive(d)的。
A common use of whichtank is to specify that a particular gas should be used only in a particular range of depths. This is done by applying ifelse to depths.dive as shown in the Examples.
whichtank一个常见的用途是指定一个特定的气体应只用于在特定的深度范围。这是通过施加ifelsedepths.dive在实施例中所示。
值----------Value----------
The value of whichtank(d) is a vector of integers or character strings.
whichtank(d)是一个向量的整数或字符串。
（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>
参见----------See Also----------
dive, tanklist
dive，tanklist
实例----------Examples----------
# tanks are numbered[坦克的编号]
d <- dive(air, c(30,40), 6, nitrox(0.5), c(6,3), c(3,3))
d
tanklist(d)
whichtank(d)
# change choice of tank at 6 metre deco stop[改变选择的坦克装饰停在6米]
# The Hard Way:[艰难的历程：]
whichtank(d) <- c(1,1,1,1,1,2,2,2)
d
# The Snazzy Way:[时髦的方式：]
# if shallower than 3 metres, then tank 2, else tank 1[如果深度小于3米，然后，否则罐2罐1]
whichtank(d) <- ifelse(depths.dive(d) <= 3, 2, 1)
d
# tanks with names[坦克的名字]
dd <- dive(tanklist=list(travel=trimix(0.18, 0.5), deco=nitrox(0.8)),
tank="travel", c(30,40), c(20, 10), 9, tank="deco",
c(9,10), c(6,5), c(3,5))
dd
# if shallower than 6 metres, then deco gas, else travel gas[如果深度小于6米，装饰气体，其他旅游气体]
whichtank(dd) <- ifelse(depths.dive(dd) <= 6, "deco", "travel")
dd
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。
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发表于 2012-9-29 23:11:12
