**Contents**show

## How do you swap columns and rows in Java?

**Java Program to Interchange any two Rows & Columns in the given…**

- import java.util.Scanner;
- public class Interchange.
- {
- public static void main(String[] args)
- {
- int p, q, n, x , y, temp = 0, k = 0;
- Scanner s = new Scanner(System. in);
- System. out. print(“Enter number of rows in matrix:”);

## How do you swap rows in a matrix in Java?

**Approach**

- If First and Second are same, then print the matrix as it is.
- Else Loop over the Kth and Lth row of the matrix.
- Swap the elements ith index of both the rows while traversal.
- Now after the loop gets over, print the matrix.

## How do you swap rows in an array?

**How to swap two rows of an array using numpy**

- Step 1 – Import the library. import numpy as np. …
- Step 2 – Defining random array. a = np.array([[4,3, 1],[5 ,7, 0],[9, 9, 3],[8, 2, 4]]) print(a) …
- Step 3 – Swapping and visualizing output. a[[0, 2]] = a[[2, 0]] print(a) …
- Step 4 – Lets look at our dataset now.

## How do I swap rows in a matrix?

Elementary Operations

There are three kinds of elementary matrix operations. Interchange two rows (or columns). Multiply each element in a row (or column) **by a non-zero number**. Multiply a row (or column) by a non-zero number and add the result to another row (or column).

## How do you swap rows in C++?

**The program output is also shown below.**

- /*
- * C++ Program to interchange the rows of a matrix.
- #include <iostream>
- using namespace std;
- int main() {
- int xsize, ysize, * swap;
- int row1, row2;
- cout << “Enter the size of matrix : “;

## How do you swap a 2D array?

I write this method for swapping two elements in a 2D array: **public void swap(Object[][] array, int a, int b)** { Object temp; temp = array[a]; array[a] = array[b]; array[b] = temp; // Error, Why? }

## How do you swap rows in Matlab?

**Switching rows in matrix**

- function m = move(M,i,j)
- [x, y] = size(M); %n is rows and m is columns.
- submatrix = M([i:x],[1:y]); %creates submatrix of ith row down.
- column_j = submatrix(:,j); %gives jth column.
- row = find(column_j,1); %gives row number of first nonzero.
- i = M(i,:); %gives ith row of M.

## What is a beautiful matrix?

A **matrix V consisting of N rows and M columns** is called beautiful if and only if it satisfies the following two conditions: 1) Every cell of the matrix contains distinct natural number less or equal to N*M.

## How do you swap rows in pandas?

**Use the T attribute or the transpose() method to swap (= transpose)** the rows and columns of pandas. DataFrame . Neither method changes the original object, but returns a new object with the rows and columns swapped (= transposed object).

## How do I switch rows in NumPy?

To transpose NumPy array ndarray (swap rows and columns), use **the T attribute ( .** **T ), the ndarray method transpose() and the numpy.** **transpose() function**.

## How do you find the most frequent value in an array?

**Find the most frequent value in a NumPy array**

- Create a NumPy array.
- Apply bincount() method of NumPy to get the count of occurrences of each element in the array.
- The n, apply argmax() method to get the value having a maximum number of occurrences(frequency).