Swapping Two Elements in Each Row of a Matrix Without Loop in MATLAB

A Matrix is a two-layered cluster of numbers. In MATLAB, we can create a Matrix by entering components in each line as comma or space-delimited numbers and also, utilizing semicolons to stamp the finish of each line.

Approach:

• Step 1: Pick 2 elements in a row using logical()
• Step 2: Get all possible Combinations using perms()
• Step 3: Pick 5 Random Numbers from 1 to 24 using Randi() function
• Step 4: Logical Index to Pick Numbers in Each Row
• Step 5: Create A Matrix (Original)
• Step 6: Transpose the Matrix
• Step 7: Pick the Data. Each column contains two numbers from each row in the matrix A
• Step 8: Swap the values
• Step 9: Fill Back the Data
• Step 10: Transpose to give the Final Result

Example:

Matlab

% MATLAB Program to Swap 2 Elements
% in each row without Loops
% Step1 : Pick 2 elements in a row
flag=logical([0 0 1 1]);

% Step2 : Get all possible Combinations
p=perms(flag);

% Step3 : Pick 5 Random Numbers from 1 to 24
index1=randi(24,5,1);

% Step4 : Logical Index to Pick Numbers in Each Row
index=p(index1,:);

% Step5 : Create A Matrix (Original)
A=reshape(1:20,5,4)

% Step6 : Transpose the Matrix
B=A';
data=B(index');

% Step7 : Pick the Data
% Each column contains two numbers from each row in the matrix A
data=reshape(data,2,[])

% Step8 : Swap the values
data=data([2,1],:)

% Step9 : Fill Back the Data
B(index')=data;

% Step10 : Transpose to give the Final Result
B=B'

Output: