function plot_data(data_name)
    load(data_name);
    clc
    press_1 = m(1,:);
    press_2 = m(2,:);
    
    press_max = 0;
    press_min = 0;

    state =0;
    bushu =0;

    buff_len = length(press_1(:));
    mdflag =(1:buff_len);
    mdmin_buff =(1:buff_len);
    mdmax_buff =(1:buff_len);
    lvbo=(1:5);
    for k = 1:buff_len
%      disPress(1) = press_1(k);
%      disPress(2) = PressBasic;
%      disPress(3) = press_min;
%      disPress(4) = press_max;
%      disp(disPress);

    
     for i=1:4
         lvbo(i) = lvbo(i+1);
     end
     lvbo(5) = press_1(k);
     avage = (lvbo(2)+lvbo(3)+lvbo(4))/3;
     if avage >= lvbo(1) && avage >= lvbo(5)
          if press_1(k) ~= 0
            if k >= 2
            press_min =   lvbo(5)+200;
            press_max =   lvbo(5)+700;
            end
          end   
     end
     switch state
         case 0
              mdflag(k) = 0;
              if press_1(k) > press_max
                 state = 1;
                 bushu = (bushu+1);
                 mdflag(k) = 300;
              end
         case 1
               mdflag(k) = 0;
              
              if press_1(k) < press_min 
                 state=0;
              end
     end
   
     if k >= 2
         mdmin_buff(k) = press_min;
         mdmax_buff(k) = press_max;
     end
    end
    figure;
    plot(press_1);
     hold on; 
    plot(mdflag);
    hold on;
    plot(mdmin_buff);
    hold on;
    plot(mdmax_buff);
    hold on;
    disp(['计算的步数:',num2str(bushu)]);
    legend('前脚','后脚')
end