R语言 计算累积泊松密度 – ppois()函数
R语言中的 ppois() 函数用于计算泊松分布的累积密度函数。
语法: ppois(vec, lambda)
参数:
vec: 整数序列
lambda: 每个区间的平均事件数
例1 :
# R program to compute
# Cumulative Poisson Density
# Sequence of x-values
x <- seq(-10, 10, by = 1)
# Calling ppois() Function
y <- ppois(x, lambda = 5)
y
输出
[1] 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000
[7] 0.000000000 0.000000000 0.000000000 0.000000000 0.006737947 0.040427682
[13] 0.124652019 0.265025915 0.440493285 0.615960655 0.762183463 0.866628326
[19] 0.931906365 0.968171943 0.986304731
例2 :
# R program to compute
# Cumulative Poisson Density
# Sequence of x-values
x <- seq(1, 20, by = 1)
# Calling ppois() Function
y <- ppois(x, lambda = 10)
# Plot a graph
plot(y)
输出: