comparing numbers on the same vector

hi, i have vector

x=[1 ;5; 20; 10; 15 ;30];

i want to have

y=[1 ;1;1;0;0;1];

such that if the number is bigger than the maximum number (before him) i get 1 else i get 0

here is my try

for i=x(:)
    if i> max(x(1:i-1))
        y(i)=1 ;
    else y(i)=0 ;
    end
end

but i know that something wrong with max(x(1:i-1))

Answer 1

[Roger Stafford]

   y(1) = true;
   for k = 2:length(x)
     y(k) = (max(x(1:k-1))<x(k));
   end
   y = double(y);

[jean claude]

good answer thanks a lot !

Answer 2

[Andrei Bobrov]

out = all(bsxfun(@ge,x,x') + triu(ones(numel(x)),1),2);

[jean claude]

thanks !