volkov(untb)
volkov()所属R语言包:untb
Expected frequency of species
预期频率的物种
译者:生物统计家园网 机器人LoveR
描述----------Description----------
Given a community size, biodiversity parameter theta, and an immigration rate m, returns the expected frequency of species with n individuals, for 0<n<=J.
一个社区规模,生物多样性参数theta,和移民率m,返回的种类与预期的频率n个人,0<n<=J。
用法----------Usage----------
volkov(J, params, bins = FALSE, give = FALSE)
参数----------Arguments----------
参数:J
Size of community
社区的大小
参数:params
A two-element vector with first element interpreted as theta, the Fundamental biodiversity parameter and the second, m, interpreted as the probability of immigration. This argument will accept the output of optimal.params()
两元素向量的第一个元素解释为θ,生物多样性的基本参数和第二,M,解释为移民的可能性。该参数将接受的输出作为optimal.params()
参数:bins
Boolean, with default FALSE meaning to return the expected number of species with 1,2,...J individuals, and FALSE meaning to return the binned total, using a Preston-like binning system as used in preston()
布尔,默认FALSE的这意味着返回预期的物种数量1,2,...J个人,FALSE这意味着返回的分级总,使用普雷斯顿般的分级系统中所用的preston()
参数:give
Boolean, with TRUE meaning to return all the output of integrate(), and default FALSE meaning to return just the value of the integral
布尔值,TRUE这意味着返回的输出integrate(),默认FALSE的这意味着返回的积分值
值----------Value----------
Returns an object of class “phi”.
返回一个对象类“PHI”。
注意----------Note----------
The method used is slightly inefficient: the terms to the left of the integral sign [in Volkov's equation 7] are integrated and this is, strictly, unnecessary as it is not a function of y. However, taking advantage of this fact results in messy code.
使用的方法是稍微低效:[积分符号[沃尔科夫的式(7)的左侧的条款是集成的,严格地说,这是不必要的,因为它不是一个功能y。然而,趁着混乱的代码这一事实的结果。
(作者)----------Author(s)----------
Robin K. S. Hankin
参考文献----------References----------
abundance in ecology”. Nature, volume 424, number 28.
参见----------See Also----------
phi,preston
phi,preston
实例----------Examples----------
## Not run: [#不运行:]
volkov(J=21457,c(theta=47.226, m=0.1)) # Example in figure 1[实施例在图1中]
## End(Not run) [#(不执行)]
volkov(J=20,params=c(theta=1,m=0.4))
data(butterflies)
r <- plot(preston(butterflies,n=9,orig=TRUE))
## Not run: jj <- optimal.params(butterflies) # needs PARI/GP[#不运行:JJ - optimal.params(蝴蝶)#需要PARI / GP]
jj <- c(9.99980936124759, 0.991791987473506)
points(r,volkov(no.of.ind(butterflies), jj, bins=TRUE),type="b")
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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