在 R 编程中获取两个对象之间的独占元素 – setdiff()函数

R 编程语言中的setdiff()函数用于查找在第一个对象中但不在第二个对象中的元素。

Syntax: setdiff(x, y)

Parameters:

x and y: Objects with sequence of items

R – setdiff()函数示例

示例 1：将 setdiff 应用于 R 语言中的数值向量

R

# R program to illustrate
# the use of setdiff() function
   
# Vector 1
x1 <- c(1, 2, 3, 4, 5, 6, 5, 5)   
   
# Vector 2 
x2 <- c(2:4)    
   
# Calling setdiff() Function
x3 <- setdiff(x1, x2)      
   
print(x3)

R

# R program to illustrate
# the use of setdiff() function
   
# Vector 1
x <- c("GFG", "GEEKS")   
   
# Vector 2 
y <- c("GFG", "Welcome", "HOME")    
   
# Calling setdiff() Function
x3 <- setdiff(x, y)      
   
print(x3)

R

# R program to illustrate 
# the use of setdiff() function
   
# Data frame 1
data_x <- data.frame(x1 = c(5, 6, 7),    
                     x2 = c(2, 2, 2))
   
# Data frame 2
data_y <- data.frame(y1 = c(2, 3, 4),       
                     y2 = c(2, 2, 2))
   
# Calling setdiff() Function
data_z <- setdiff(data_x, data_y)  
   
print(data_z)

输出：

[1] 1 5 6

示例 2：将 setdiff 应用于 R 语言中的字符向量

R

# R program to illustrate
# the use of setdiff() function
   
# Vector 1
x <- c("GFG", "GEEKS")   
   
# Vector 2 
y <- c("GFG", "Welcome", "HOME")    
   
# Calling setdiff() Function
x3 <- setdiff(x, y)      
   
print(x3)

输出：

[1] "GEEKS"

示例 3：R 数据帧之间的 setdiff

R

# R program to illustrate 
# the use of setdiff() function
   
# Data frame 1
data_x <- data.frame(x1 = c(5, 6, 7),    
                     x2 = c(2, 2, 2))
   
# Data frame 2
data_y <- data.frame(y1 = c(2, 3, 4),       
                     y2 = c(2, 2, 2))
   
# Calling setdiff() Function
data_z <- setdiff(data_x, data_y)  
   
print(data_z)

输出：