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How to check for the dimension of an array in R

Onyejiaku Theophilus Chidalu

Overview

An array in R is simply a data structure that can hold multi-dimensional data of the same type in a single variable. The array object can hold data of two or more dimensions.

Obtaining the dimension of an array

To obtain the dimension of an array in R, we use the dim() function.

Syntax

dim(array)

Parameter value

The dim() function takes a single parameter value that represents the array object.

Return value

The dim() function returns the dimension of the array object.

Example

# creating an array variable
myarray <- c(1:10)

# creating a multidimensional array
multiarray <- array(myarray, dim = c(3,2))

# using the dim() function to obtain the dimension of the array
dim(multiarray)
Implementing the dim() function

Explanation

  • Line 2: We create an array variable myarray with its elements ranging from 1 to 10.
  • Line 5: Using the array() function, we create a 3 by 2 dimensional array.
  • Line 8: Using the dim() function, we check for the dimension of the array multiarray.

Note: The output of the code above (3 2) simply means that the array is a 3 by 2 array.

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arrays
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Onyejiaku Theophilus Chidalu
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