function that can do random drawing

I have the following probabilities: 0.8 for category 1 and 0.2 for category 0. I need to randomly draw a category (0/1) such that the it satisfies the probability distribution. Is there such a thing in matlab? Thanks

Answer 1

[Wayne King]

You can just use rand.

    for nn = 1:1000
    drawnum = rand(1);
    if( drawnum <= 0.2)
    category(nn) = 1;
    else
    category(nn) = 0;
    end
    end