Create a Matrix by Selecting All Rows Randomly

Now we are creating a matrix by selecting all rows randomly. In this, we will declare a number of rows and columns and we create columns through another. 

Below are the examples through which we can understand.

Syntax:

variable1 = rand(rows,columns); %make a matrix of nth rows and m columns.

variable2 = randperm(nth_rows); %select rows randomly

Explanation:- rand() command makes a matrix of rows and columns and randomly stores a number.

Example:

Output:

Explanation:

 In this, we are declaring i =5, j=6 ( number of rows and columns ) and we create columns through another.  This means we are creating a matrix of possible row combinations and at last, we will display it on our screen.

A  matrix represents a collection of numbers arranged in an order of rows and columns. A matrix encloses the elements in parentheses or brackets.  We will learn how to create a new matrix from all possible row combinations of rows of a different matrix and display the combinations. 

Procedure of Making a Matrix:

• Declare the number of rows.
• Declare a number of columns
• Using the ‘rand’ function to pick random rows from a matrix.
• Select rows randomly
• Print matrix.

We can see the below examples to create a new matrix from all possible row combinations.

Syntax:

variable = randperm(parameter , parameter); %for taking random numbers

From the command randperm() it uses random numbers to make a matrix of row combinations.

Example:

Output:

Explanation:

In the above example, we are declaring the number of rows, and columns, and declaring a variable that stores random numbers and makes a matrix. In the above, we are taking random numbers in the matrix but we can also declare typically.