MATLAB: Generating 100 people walk 100 steps and show there final position on a histogram

histogramMATLAB

%% Initial Values
x=[50,100];
steps=100;
position=0;
blackhole=100;
speedzone=-30;
dead=0;
%% for loop
for k=1:length(x)
    d=zeros(1,x(k));
    for j=1:x(k)
        for i=1:steps
            length=rand(1,2);
            secondlength=rand;
            s=rand(1,2);
            if s==1
                position=position+length;
            elseif s==2 
                position=position-length;
            end
            if position>blackhole
                dead=dead+1;
            elseif position<speedzone && s==1
                position=position+secondlength;
            elseif position<speedzone && s==2
                position=position-secondlength;
            end
        end
        d(j)=position;
    end
    figure,hist(d,50),title([num2str(x(k)),' people taking 2500 steps'])
end
Everytime I run this I get two histograms with only 50 and 100 final positions of 0. If anyone can help that'd be great, Thanks.

Best Answer

a=randi(2,100,10000);%added a few more people
a(a==2)=-1;%1==+step, 2==-step
histogram(sum(a),40);
Related Question