How to generate a random matrix ?

how to generate (4,4) a 20 binary random matrix in one function? like this

x1 = [ 1 0 1 0
       1 1 0 0
       0 1 1 0
       0 0 1 0 ]

 x2 = [ 1 1 0 1 
        0 1 0 0
        1 1 0 1
        0 1 0 1 ]
 .
 .
 .
 .

 x20 = [ 1 0 1 0
         0 0 0 1
         1 1 1 0
         1 0 1 1 ]

Answer 1

[Image Analyst]

Try this:

x1 = randi([0, 1], [4,4])

Repeat for all of the other x. Or else (better because it's possibly more convenient), make a 3D array of 4-by-4-by-20.

Note: x1 is a double. If you want a binary as a boolean or logical, cast to logical:

x1 = logical(randi([0, 1], [4,4]))

[Star Strider]

To specify the size of a square matrix, it is only necessary to use one dimension:

x1 = randi([0, 1], 4)

The matrix-generating functions assume a square matrix.

[Hirak Basumatary]

How to generate unique random matrices ? Any algo for this?

[Image Analyst]

You can use isequal() to compare the new matrix against any prior matrix.

if ~isequal(testMatrix, existingMatrix)
    % Generate new test matrix
end

Answer 2

[Harshit Agarwal]

theta = [2,1]

[Image Analyst]

That is not a 4-by-4 square. And, it is not binary. So it's not an answer to Firas's question.

Answer 3

[Jenin]

You can use x = rand(4,4,20), It will gives you 20 set of 4x4 matrices.