R Arrays

🧊 R Arrays

They are an extension of matrices and all elements must be of the same data type.

 1. What is an Array?

• Can have 2 or more dimensions

• Stores same type of data

• Useful for scientific, mathematical, and statistical computations

 2. Creating an Array

Use the array() function.

📌 This creates a 2D array (3 rows × 4 columns)

 3. Creating a 3D Array

📌 Dimensions:

• 2 rows

• 3 columns

• 2 matrices (layers)

 4. Accessing Array Elements

a) Access a single element

b) Access a full row

c) Access a full column

d) Access a full matrix (layer)

 5. Naming Dimensions

 6. Array Dimensions

✔ Output:

 7. Array Arithmetic (Element-wise)

✔ Operations apply element-wise

 8. Check if Object is Array

 9. Arrays vs Matrices

 When to Use Arrays?

✔ Multidimensional datasets
✔ Scientific simulations
✔ Image & signal processing
✔ Advanced statistics

📌 Summary

• Arrays store data in multiple dimensions

• Created using array()

• All elements must be same type

• Access using [row, column, layer]

• Extension of matrices