In this article, we will discuss how we do the Intersection of Two Objects in R Programming Language using the intersect() function.
What is the intersect() Function?
intersect() function in R Programming Language is used to find the intersection of two Objects. This function takes two objects like Vectors, Dataframes, etc. as arguments and results in a third object with the common data of both objects.
Syntax: intersect(x, y)
Parameters:x and y: Objects with the sequence of items
Example 1: the intersection of two vectors
# R program to illustrate
# intersection of two vectors
# Vector 1
x1 <- c(1, 2, 3, 4, 5, 6, 5, 5)
# Vector 2
x2 <- c(2:4)
# Intersection of two vectors
x3 <- intersect(x1, x2)
print(x3)
Output:
[1] 2 3 4
Example 2: intersect() function with character vectors
#define two vectors
x <- c('A', 'B', 'C', 'D', 'E', 'F')
y <- c('C', 'D', 'E', 'F')
#find intersection between two vectors
intersect(x, y)
Output:
[1] "C" "D" "E" "F"
Example 3: The intersection of two data frames
# R program to illustrate
# the intersection of two data frames
# Data frame 1
data_x <- data.frame(x1 = c(2, 3, 4),
x2 = c(1, 1, 1))
# Data frame 2
data_y <- data.frame(y1 = c(2, 3, 4),
y2 = c(2, 2, 2))
# Intersection of two data frames
data_z <- intersect(data_x, data_y)
print(data_z)
Output:
$x1
[1] 2 3 4Example 4: The intersection of two Matrix
# create matrix one
a1<- matrix(1:9,3,3)
a1
# create matrix secound
a2<-matrix(1:12,3,4)
a2
# intersect both metrix
intersect(a1,a2)
Output:
[,1] [,2] [,3]
[1,] 1 4 7
[2,] 2 5 8
[3,] 3 6 9 [,1] [,2] [,3] [,4]
[1,] 1 4 7 10
[2,] 2 5 8 11
[3,] 3 6 9 12[1] 1 2 3 4 5 6 7 8 9