SOLVED: Error while trying to repeat a script multiple times in a for loop

Hi there,

I am trying to execute this code 500 times and save it as an array, x.

 u=rand();
     m=1;
    while(u>=cum_prob(m))%
              m=m+1;
     end
     x=(bin_edges(m-1)-bin_edges(m-2))/(cum_prob(m-1)-cum_prob(m-2))*(u-((((bin_edges(m-1)*cum_prob(m-2))-((bin_edges(m-2)*cum_prob(m-1))))/(bin_edges(m-1)-bin_edges(m-2)))));

That works when I run it. Now i need to do this 500 times and stores the results in an array, x. The code that I have written to do so is shown below, however I am getting the error "Array indices must be positive integers or logical values." at the line that starts with x(a)=.....

    x=zeros(1,500);
    for a=1:500
        u=rand();

        m=1;
        while(u>=cum_prob(m))%
            m=m+1;
        end

        x(a)=(bin_edges(m-1)-bin_edges(m-2))/(cum_prob(m-1)-cum_prob(m-2))*(u-((((bin_edges(m-1)*cum_prob(m-2))-((bin_edges(m-2)*cum_prob(m-1))))/(bin_edges(m-1)-bin_edges(m-2)))));

    end

If anyone could please point me in the right direction, that would be great! Thankyou

[Alex Mcaulley]

We don't have your variables cum_prob and bin_edges to see what is happening. But I guess that the problem is: What happens when m == 1 or m == 2?

cum_prob(-1) %or cum_prob(0) are not defined!