over180=zeros(30,1);
over240=zeros(30,1);
x=1:length(03hour);
for k=1:30
    ores=k*24-23:k*24;
    over180(k)=sum(03hour>180)
    over240(k)=sum(03hour>240)
end
subplot(2,1,1)
plot(x,03hour,'b',[0,length(03hour)],[180,180])