Java Program to perform Matrix Transpose

Posted in Java Tutorial

Updated on Oct 30, 2024

By Mari Selvan

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⏳ 4 mins

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Java Program to perform Matrix Transpose

Photo Credit to CodeToFun

🙋 Introduction

Matrix operations are fundamental in various fields of computer science and mathematics. One common operation is the transpose of a matrix.

Transposing a matrix involves swapping its rows with columns, resulting in a new matrix where the rows of the original matrix become the columns, and vice versa.

In this tutorial, we'll explore a Java program that performs the transpose operation on a given matrix.

Understanding and implementing matrix operations is essential for various applications, including graphics, scientific computing, and data manipulation.

📄 Example

Now, let's look at the Java code that performs matrix transpose.

MatrixTranspose.java

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public class MatrixTranspose {

  // Function to perform matrix transpose
  static void transposeMatrix(int[][] matrix, int rows, int cols) {
    int[][] transposedMatrix = new int[cols][rows];

    // Performing the transpose operation
    for (int i = 0; i < cols; ++i) {
      for (int j = 0; j < rows; ++j) {
        transposedMatrix[i][j] = matrix[j][i];
      }
    }

    // Displaying the transposed matrix
    System.out.println("Transposed Matrix:");
    for (int i = 0; i < cols; ++i) {
      for (int j = 0; j < rows; ++j) {
        System.out.print(transposedMatrix[i][j] + "\t");
      }
      System.out.println();
    }
  }

  // Driver program
  public static void main(String[] args) {
    // Replace these values with your matrix dimensions and elements
    int[][] matrix = {
      {1, 2, 3},
      {4, 5, 6}
    };
    int rows = 2;
    int cols = 3;

    // Call the function to perform matrix transpose
    transposeMatrix(matrix, rows, cols);
  }
}

💻 Testing the Program

To test the program with a different matrix, replace the values of matrix, rows, and cols in the main method.

Output

Transposed Matrix:
1       4
2       5
3       6

Compile and run the program to see the transposed matrix.

🧠 How the Program Works

The program defines a class MatrixTranspose containing a static method transposeMatrix that takes a matrix, number of rows, and number of columns as input and computes the transpose of the matrix.
Inside the method, it uses nested loops to swap the rows with columns and stores the result in a new matrix transposedMatrix.
The transposed matrix is then displayed.

🧐 Understanding the Concept of Matrix Transpose

Matrix transpose is a fundamental operation where the rows and columns of a matrix are swapped. If a matrix has dimensions m×n, its transpose will have dimensions n×m. The element at position (i, j) in the original matrix becomes the element at position (j,i) in the transposed matrix.