transpose of a matrix in java without using second matrix

import java.util.Scanner; public class MatrixTransposeInJava { public static void main(String[] args) { int[][] arrGiven = {{2,4,6},{8,1,3},{5,7,9}}; // another matrix to store transpose of matrix int[][] arrTranspose = new int[3][3]; // transpose matrix code for(int a = 0; a < 3; a++) { for(int b = 0; b < 3; b++) { arrTranspose[a][b] = arrGiven[b][a]; } } System.out.println("Before matrix transpose: "); for(int a = 0; a < 3; a++) { for(int b = 0; b < 3; b++) { System.out.print(arrGiven[a][b] + " "); } System.out.println(); } System.out.println("After matrix transpose: "); for(int a = 0; a < 3; a++) { for(int b = 0; b < 3; b++) { System.out.print(arrTranspose[a][b] + " "); } System.out.println(); } } }

// transpose of a matrix in java without using second matrix
import java.util.Scanner;
public class WithoutSecondMatrix
{
   public static void main(String[] args)
   {
      Scanner sc = new Scanner(System.in);
      int a, b, row, column, temp;
      System.out.println("Please enter number of rows: ");
      row = sc.nextInt();
      System.out.println("Please enter the number of columns: ");
      column = sc.nextInt();
      int[][] matrix = new int[row][column];
      System.out.println("Please enter elements of matrix: ");
      for(a = 0; a < row; a++)
      {
         for(b = 0; b < column; b++)
         {
            matrix[a][b] = sc.nextInt();
         }
      }
      System.out.println("Elements of the matrix: ");
      for(a = 0; a < row; a++)
      {
         for(b = 0; b < column; b++)
         {
            System.out.print(matrix[a][b] + "\t");
         }
         System.out.println("");
      }
      // transpose of a matrix
      for(a = 0; a < row; a++)
      {
         for(b = 0; b < a; b++)
         {
            temp = matrix[a][b];
            matrix[a][b] = matrix[b][a];
            matrix[b][a] = temp;
         }
      }
      System.out.println("transpose of a matrix without using second matrix: ");
      for(a = 0; a < row; a++)
      {
         for(b = 0; b < column; b++)
         {
            System.out.print(matrix[a][b] + "\t");
         }
         System.out.println("");
      }
      sc.close();
   }
}

Posted by: Guest on February-19-2021

Source

for (int row = 0; row < matrix.length; row++) { for (int col = row; col < matrix[row].length; col++) { // Swap int data = matrix[row][col]; matrix[row][col] = matrix[col][row]; matrix[col][row] = data; } }

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