Regarding random generation of elements in a matrix.

I have a code like this

 randi([0 1],1,10)

I want it to generate random 0 and 1. But I want that it should generate at max two ones. For e.g. I should get eight zeros and two ones randomly. Please tell how to do.

Answer 1

[Andrei Bobrov]

out = zeros(1,10);
out(randperm(10,2)) = 1;

or just

out = randperm(10) > 8;

Answer 2

[Roger Stafford]

You stated "at max two ones", Abhinav. If you want to include the cases where there are less than two 1's, you could do it this way:

   A = zeros(1,10);
   if rand <= 55/56
     i1 = randi(10);
     A(i1) = 1;
     if rand <= 45/55
       i2 = randi(9);
       if i2 >= i1
         i2 = i2 + 1;
       end
       A(i2) = 1;
     end
   end