Check if an Object is of Type Numeric in R Programming - is.numeric() Function

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

Last Updated : 12 Jun, 2020

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:

# 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:

# 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

Check if an Object is of Type Numeric in R Programming - is.numeric() Function

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