Need help creating an matrix that includes probability

So i am asked to make an matrix that is 96x96. this matrix must have a 5% probability of getting a 0 instead of a 1. i know that when creating the matrix i can write

matrix= ones (96,96)

i just dont know how to implement the random generating

Answer 1

[the cyclist]

There are many ways to generate pseudorandom numbers in MATLAB. Since this sounds like homework, I'll just point you to this documentation page to get you started.

[Raul Castillo]

thx

[Raul Castillo]

r = randi([0 1],96,96) so i found this way of doing it but it just randomly genereates zeros and ones. how can i control the random ability to be 5%?

[the cyclist]

You can certainly do the task using randi. But you are correct that your syntax is not the way.

The syntax

randi(100,96,96)

will generate a 96x96 matrix of numbers, where each one is randomly drawn from 1 to 100.

Can you think of a way to then transform that matrix to one with 0's and 1's, where 95% are 1's (on average)?

You could also do a very simliar method using rand instead of randi.

Answer 2

[Ajay Kumar]

r = randi([0 1],96,96);
zero_count = round(0.05*numel(r));
count = 0;
for i = 1 : 96
    for j = 1: 96
        if r(i,j) == 0
            count = count+1;
            if count > zero_count
                r(i,j) = 1;
            else
            end
        end
    end
end

[the cyclist]

I assume Raul meant that each matrix element has a 5% chance of being zero. This method will not yield that.