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for ii=1:mk;     ²âµã¸öÊý
sf=100;  %¶ÁÈë²ÉÑùƵÂÊÖµ
nt=length(x(ii,);
t1=0:1/sfnt-1)/sf;  %ԭʼÊý¾ÝµÄʱ¼ä×ø±ê
figure(1)
h1=plot(t1,x(ii,);
xlabel('ʱ¼ä(s)');
ylabel('¼ÓËÙ¶È·ùÖµ(cm/s2)');
grid on;            %´òӡԭʼ¼ÓËÙ¶Èʱ³ÌÇúÏß
filename1=['SE4.6' num2str(ii) '¼ÓËÙ¶Èʱ³ÌÇúÏß.jpg'];
saveas(h1,filename1)
close(1);

np=100;  %Êä³öÊý¾Ý³¤¶È
s=1.5*std(x(1,);  %¶à´ÎÑéË㣬ȡ1.5±¶µÄ±ê×¼²î×ÔÓÉÇúÏ߱ȽϹ⻬
m=0;
y=zeros(1,np);
for k=2:nt-np
    a=abs(x(1,k-1)-s);
    b=abs(x(1,k)-s);
    c=abs(x(1,k+1)-s);    %´¥·¢Ìõ¼þΪ×î½Ó½üSµÄµã
    if b<a&b<c
        y(1:np)=y(1:np)+x(ii,k:k+np-1);
        m=m+1;
    end
end
y=y./m;
end



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