While loop inside for loop in Matlab

Question

I am trying to using a while loop inside a for loop in Matlab. The while loop will repeat the same action until it satifies some criteria. The outcome from the while loop is one iteration in the for loop. I am having a problem to get that correctly.

n=100;
for i=1:n
    while b<0.5
        x(i)=rand;
        b=x(i);
    end
end

I am not sure what i am doing wrongly. Thanks

Answer 1

Approach the problem differently. There's no need to try again if rand doesn't give you the value you want. Just scale the result of rand to be in the range you want. This should do it:

x = 0.5 + 0.5*rand(1, 100);