# Demo entry 6354583

11

Submitted by anonymous on Apr 09, 2017 at 10:43
Language: Matlab. Code size: 1.4 kB.

```%%%%%%%%%%%%%%%%%%%%%%%´úÂë6£ºÊä³öº¯Êý%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%Êä³öÇ±Á÷½»»»ÌØÕ÷²ÎÊý%%%%%%%%%%%%%%%%%%%%%
function f = particle_output()

%ÒýÈëÈ«¾Ö±äÁ¿
global workplace
global boundry
global timestep

%´ÓÈ«¾Ö±äÁ¿¶ÁÈ¡¼ÆËãÊý¾Ý
boundry_x = sort(boundry(1,:));
boundry_y = sort(boundry(2,:));
max_step = timestep(2);

%¶¨ÒåÇ±Á÷½»»»ÌØÕ÷²ÎÊý±äÁ¿
particle_distance = []; %Ç±Á÷½»»»¾àÀë
particle_depth = []; %Ç±Á÷½»»»Éî¶È
particle_time = []; %Ç±Á÷½»»»Ê±¼ä

%´ò¿ª¼ÇÂ¼Á£×ÓÔË¶¯¹ì¼£µÄÎÄ¼þÒÔ¶ÁÈ¡Êý¾Ý
fid = fopen([workplace,'\particle.txt'],'r');
%Ñ­»·¶ÁÈ¡Á£×Ó¹ì¼£
while ~feof(fid)
x = str2num(fgetl(fid));
y = str2num(fgetl(fid));
t = str2num(fgetl(fid));
%¼ÆËãÇ±Á÷½»»»ÌØÕ÷²ÎÊý
if length(t) < max_step && y(end)>boundry_y(2) && x(end)>boundry_x(1) && x(end)< boundry_x(end)
dx = [x,0]-[0,x];
dx = dx(2:end-1);
dy = [y,0]-[0,y];
dy = dy(2:end-1);
particle_distance(end+1) = sum((dx.^2+dy.^2).^0.5);
particle_depth(end+1) = abs(max(y) - min(y));
particle_time(end+1) = max(t);
end
end

%Êä³öÇ±Á÷½»»»ÌØÕ÷²ÎÊý
fprintf('Ç±Á÷½»»»Æ½¾ùÍ£ÁôÊ±¼ä£º%s Ãë\n',num2str(mean(particle_time)));
fprintf('Ç±Á÷½»»»Æ½¾ùÇ¨ÒÆ¾àÀë£º%s Ã×\n',num2str(mean(particle_distance)));
fprintf('Ç±Á÷½»»»×î´ó½»»»Éî¶È£º%s Ã×\n',num2str(max(particle_depth)));
fclose(fid);

%·µ»Øº¯Êý
return
```

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