Posnegbin(VGAM)
Posnegbin()所属R语言包：VGAM
Positive-Negative Binomial Distribution
正，负二项分布
译者：生物统计家园网 机器人LoveR
描述----------Description----------
Density, distribution function, quantile function and random generation for the positive-negative binomial distribution.
密度，分布函数，为正负的二项式分布的分位数的功能和随机生成。
用法----------Usage----------
dposnegbin(x, size, prob = NULL, munb = NULL, log = FALSE)
pposnegbin(q, size, prob = NULL, munb = NULL)
qposnegbin(p, size, prob = NULL, munb = NULL)
rposnegbin(n, size, prob = NULL, munb = NULL)
参数----------Arguments----------
参数：x, q
vector of quantiles.
向量的位数。
参数：p
vector of probabilities.
向量的概率。
参数：n
number of observations. Fed into runif.
若干意见。送入runif。
参数：size, prob, munb, log
Same arguments as that of an ordinary negative binomial distribution (see dnbinom). Some arguments have been renamed slightly. Short vectors are recycled. The parameter 1/size is known as a dispersion parameter; as size approaches infinity, the negative binomial distribution approaches a Poisson distribution.
相同的参数，一个普通的负二项分布（见dnbinom“）。稍微有些参数已被重命名。短向量的回收再利用。参数1/size被称为分散参数; size趋近于无穷大，负二项式分布接近泊松分布。
Details
详细信息----------Details----------
The positive-negative binomial distribution is a negative binomial distribution but with the probability of a zero being zero. The other probabilities are scaled to add to unity. The mean therefore is
正负二项分布是一种负二项式分布，但零是零的概率。其他的概率按比例添加到团结。因此，平均是
where munb the mean of an ordinary negative binomial distribution.
munb一个普通的负二项分布的平均值。
值----------Value----------
dposnegbin gives the density, pposnegbin gives the distribution function, qposnegbin gives the quantile function, and rposnegbin generates n random deviates.
dposnegbin给出了密度，pposnegbin给出了分布函数，qposnegbin给出了分位数的功能，和rposnegbin产生n随机偏离。
（作者）----------Author(s)----------
T. W. Yee
参考文献----------References----------
D. B. (1996) Modelling the abundances of rare species: statistical models for counts with extra zeros. Ecological Modelling, 88, 297–308.
参见----------See Also----------
posnegbinomial, zanegbinomial, zinegbinomial, rnbinom.
posnegbinomial，zanegbinomial，zinegbinomial，rnbinom。
实例----------Examples----------
munb <- 5; size <- 4; n <- 1000
table(y <- rposnegbin(n, munb = munb, size = size))
mean(y) # sample mean[样本均值]
munb / (1 - (size / (size + munb))^size) # population mean[人口平均]
munb / pnbinom(0, mu = munb, size = size, lower.tail = FALSE) # same as before[和以前一样]
x <- (-1):17
(ii <- dposnegbin(x, munb = munb, size = size))
max(abs(cumsum(ii) - pposnegbin(x, munb = munb, size = size))) # Should be 0[应为0]
## Not run: [＃不运行：]
x <- 0:10
barplot(rbind(dposnegbin(x, munb = munb, size = size),
dnbinom(x, mu = munb, size = size)),
beside = TRUE, col = c("blue","green"),
main = paste("dposnegbin(munb = ", munb, ", size = ", size, ") (blue) vs",
" dnbinom(mu = ", munb, ", size = ", size, ") (green)", sep = ""),
names.arg = as.character(x))
## End(Not run)[＃（不执行）]
# Another test for pposnegbin()[另一个测试pposnegbin（）]
nn <- 5000
mytab <- cumsum(table(rposnegbin(nn, munb = munb, size = size))) / nn
myans <- pposnegbin(sort(as.numeric(names(mytab))), munb = munb, size = size)
max(abs(mytab - myans)) # Should be 0[应为0]
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。
|
发表于 2012-10-1 15:48:30
