Creating an Array in R with named dimensions

R Programming: Basic Exercise-17 with Solution

Write a R program to create an array, passing in a vector of values and a vector of dimensions. Also  provide names for each dimension.

Sample Solution :

R Programming Code :

# Create an array with values from 6 to 30
a = array(
  6:30,  # Define the values for the array
  dim = c(4, 3, 2),  # Specify the dimensions of the array: 4 rows, 3 columns, 2 parts
  dimnames = list(  # Provide names for the dimensions
    c("Col1", "Col2", "Col3", "Col4"),  # Names for the columns
    c("Row1", "Row2", "Row3"),  # Names for the rows
    c("Part1", "Part2")  # Names for the parts
  )
)

# Print the content of the array
print(a)

Output:

, , Part1

     Row1 Row2 Row3
Col1    6   10   14
Col2    7   11   15
Col3    8   12   16
Col4    9   13   17

, , Part2

     Row1 Row2 Row3
Col1   18   22   26
Col2   19   23   27
Col3   20   24   28
Col4   21   25   29                         

Explanation:

• a = array(...): Creates an array and assigns it to the variable a.
• 6:30: Defines a sequence of integers from 6 to 30 to be used as the array's values.
• dim = c(4, 3, 2): Specifies the dimensions of the array:
• 4 rows
• 3 columns
• 2 matrices (or "parts")
• dimnames = list(...): Assigns names to each dimension of the array:
• c("Col1", "Col2", "Col3", "Col4"): Names for the rows.
• c("Row1", "Row2", "Row3"): Names for the columns.
• c("Part1", "Part2"): Names for the matrices (or "parts").
• print(a): Outputs the array a to the console, showing its contents and dimension names.

R Programming Code Editor:

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