R语言向数字向量添加噪声 – jitter()函数

在R编程中，抖动意味着向一个数字向量对象添加少量的随机噪声。在这篇文章中，我们将学习如何使用 jitter() 函数，并创建一个图来显示它们。

语法：jitter(x, factor)

参数：

x：代表数字向量

factor： 代表因子规格的数字值

例子1:

# Define numeric vectors
x <- round(runif(1000, 1, 10))
y <- x + rnorm(1000, mean = 0, sd = 5)
  
# output to be present as PNG file 
png(file="withoutJitter.png")
  
# Plotting without jitter function
plot(x, y, xlim = c(0, 11),
     main = "Without Jitter Function")
  
# saving the file 
dev.off()
  
x_j <- jitter(x)
  
# output to be present as PNG file 
png(file="withJitter.png")
  
# Plotting with jitter function
plot(x_j, y, xlim = c(0, 11),
     main = "With Jitter Function")
  
# saving the file 
dev.off()

输出：

在R编程中向数字向量添加噪声 - jitter()函数

例2：有大的因子值

# Define numeric vectors
x <- round(runif(1000, 1, 10))
y <- x + rnorm(1000, mean = 0, sd = 5)
  
# output to be present as PNG file 
png(file="withoutJitterFactor.png")
  
# Plotting without jitter function
plot(x, y, xlim = c(0, 11),
     main = "Without Jitter Function")
  
# saving the file 
dev.off()
  
x_j <- jitter(x, factor = 2)
  
# output to be present as PNG file 
png(file="withJitterFactor.png")
  
# Plotting with jitter function
plot(x_j, y, xlim = c(0, 11),
     main = "With Jitter Function and Large Factor")
  
# saving the file 
dev.off()