Check for Presence of Common Elements between Objects in R Programming – is.element() Function

is.element() function in R Language is used to check if elements of first Objects are present in second Object or not. It returns TRUE for each equal value.

Syntax: is.element(x, y)

Parameters:
x and y: Objects with sequence of items

Example 1:

# R program to illustrate
# the use of is.element() function

# Vector 1
x1 <- c(1, 2, 3)

# Vector 2
x2 <- c(1:6)

# Calling is.element() Function
is.element(x1, x2)
is.element(x2, x1)

Output:

[1] TRUE TRUE TRUE
[1]  TRUE  TRUE  TRUE FALSE FALSE FALSE

Example 2:

# R program to illustrate
# the use of is.element() function

# Data frame 1
data_x <- data.frame(x1 = c(5, 3, 7),
                     x2 = c(1, 4, 2))

# Data frame 2
data_y <- data.frame(y1 = c(2, 3, 4),
                     y2 = c(1, 4, 2),
                     y3 = c(3, 4, 5))

# Calling is.element() Function
is.element(data_x, data_y)
is.element(data_y, data_x)

Output:

[1] FALSE  TRUE
[1] FALSE  TRUE FALSE