计算 R 编程中的负二项式密度 – dnbinom()函数

R语言中的dnbinom()函数用于计算负二项式密度的值。它还创建了负二项式密度图。

Syntax: dnbinom(vec, size, prob)

Parameters:
vec: x-values for binomial density
size: Number of trials
prob: Probability

示例 1：

# R program to compute
# Negative Binomial Density
  
# Vector of x-values
x <- seq(0, 10, by = 1)
  
# Calling dnbinom() Function
y <- dnbinom(x, size = 10, prob = 0.5)
y

输出：

[1] 0.0009765625 0.0048828125 0.0134277344 0.0268554688 0.0436401367
 [6] 0.0610961914 0.0763702393 0.0872802734 0.0927352905 0.0927352905
[11] 0.0880985260

示例 2：

# R program to compute
# Negative Binomial Density
  
# Vector of x-values
x <- seq(0, 100, by = 1)
  
# Calling dnbinom() Function
y <- dnbinom(x, size = 10, prob = 0.5)
  
# Plot a graph
plot(y)

输出：