Hello guys, if you are wondering how to transpose a matrix in Java then you
have come to the right place. Matrix related coding problems are great way to
learn multi-dimensional array and nested loop and they are good programming
exercise for beginners. In the past, I have taught you
how to multiply matrices in Java
and
how to add/subtract matrices in Java, and in this article, I will show you how to create transpose of a given
matrix in Java, but before that let's first understand what is transpose of a
matrix means and how do you transpose a matrix in maths? Well, a transpose of
a matrix is nothing but a matrix whose rows and columns are
reversed.

For example, if you have a 2x3 matrix which has 2 rows and 3 columns then you
can create a transpose matrix by turning all the rows into columns and all the
columns into row. So the transpose of that matrix will be a 3x2 matrix, I mean
a matrix with 3 rows and 2 columns.

But, if you matrix are symmetric i.e. both rows and columns are same length
like 2x 2, 3x3 or 4x4 then both actual matrix and transpose of the matrix will
have the same number of rows and columns.

In Java, matrix is represented by
multi-dimensional array. For example a 2 x 3 matrix is a two dimensional array where each array has
3 elements. In order to transpose a matrix in Java, you need to create a new
array where number of column becomes rows and number of rows become number of
columns.

After that you just loop through the original matrix and start copying
elements from row into columns and vice-versa. This will be more clear
when you will see the
example of transposing a matrix
in our Java program.

##
__ Java program to Transpose a Matrix__

Here is a sample code in Java to transpose a given Matrix. This program
takes input from user to create original matrix and then creates a transpose
matrix and print into
console. This code can be used to check if a matrix symmetric or not, just compare
the matrix with its transpose if they are same then it's symmetric otherwise
non symmetric, also it's also useful for calculating orthogonally of a
matrix.
And, here is our complete Java program you can try in your IDE or run from command line to see transposing your matrix in action.

import java.util.Random; import java.util.Scanner; /** * Java program to find transpose of a matrix of any order. matrix exercises are * good way to learn two dimensional and multi-dimensional array in Java. * * @author Javin Paul */ public class Testing { public static void main(String args[]) { int row = 0; int column = 0; int n, c, d; Scanner console = new Scanner(System.in); System.out.println("Enter the number of rows and columns in matrix"); row = console.nextInt(); column = console.nextInt(); int matrix[][] = new int[row][column]; System.out.println("Enter the elements of matrix"); for (int i = 0; i < row; i++) { for (int j = 0; j < column; j++) { matrix[i][j] = console.nextInt(); } } System.out.println("Transpose of entered matrix "); int transpose[][] = transpose(matrix); for (int i = 0; i < column; i++) { for (int j = 0; j < row; j++) { System.out.printf("%s ", transpose[j][i]); } System.out.print("\n"); } } /** * @return transpose of given matrix in Java */ public static int[][] transpose(int[][] matrix) { int rows = matrix.length; int columns = matrix[0].length; int transpose[][] = new int[columns][rows]; for (int i = 0; i < rows; i++) { for (int j = 0; j < columns; j++) { transpose[j][i] = matrix[i][j]; } } return matrix; } } Output: Enter the number of rows and columns in matrix 2 3 Enter the elements of matrix 10 12 16 23 26 54 Transpose of entered matrix 10 23 12 26 16 54

That's all about

**how to transpose a matrix in Java**. This is an interesting Java programming exercise to learn about array data structure, particularly two dimensional array and nested loop. By solving matrix related coding problem you slowly become better at dealing with loop, control statement, and data structure.
Other

**Java Coding Problems**for Practice- how to multiply matrix in Java
- How to calculate the square root of a given number in Java
- How to count vowels and consonants in given String in Java
- How to check if given number is prime in Java
- How to check if given String is palindrome or not in Java
- How to reverse words in a given String in Java
- How to check if two rectangles intersect with each other in Java?
- How to print Fibonacci series in Java
- How to check if two given Strings are Anagram in Java
- How to find all permutations of a given String in Java
- How to reverse a String in place in Java
- How to remove duplicate elements from the array in Java

Thanks for reading this article so far. If you like this solution of
transposing a matrix in Java and my explanation then please share with your
friends and colleagues. If you have any questions or feedback then please
drop a note.

## No comments :

## Post a Comment