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Check if the Object is a Matrix in R Programming - is.matrix() Function

Last Updated : 12 Jun, 2020
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is.matrix() function in R Language is used to return TRUE if the specified data is in the form of matrix else return FALSE.
Syntax: is.matrix(x) Parameters: x: specified matrix
Example 1: Python3
# R program to illustrate
# is.matrix function

# Specifying some different types of arrays
A <- matrix(c(1:5))
B <- matrix(c(1:12), nrow = 4, byrow = TRUE)
C <- matrix(c(1:12), nrow = 4, byrow = FALSE)

# Calling is.matrix() function
is.matrix(A)
is.matrix(B)
is.matrix(C)
Output:
[1] TRUE
[1] TRUE
[1] TRUE
Example 2: Python3
# R program to illustrate
# is.matrix function

# Specifying Biochemical oxygen demand data
x <- BOD

# Calling is.matrix() function
is.matrix(x)

# Calling is.matrix() function
# over different types of data
is.matrix(4)
is.matrix("2")
is.matrix("a")
Output:
[1] FALSE
[1] FALSE
[1] FALSE
[1] FALSE

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