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2Â¥2009-06-03 18:26:07
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3Â¥2009-06-03 19:44:26
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x=[1,2,4,5,6,8];
y=[100,123,124,234,345,674];
for ii=1:6
    if ii==1
        sum(ii)=0;
    else
        sum(ii)=sum(ii-1)+(y(ii)-y(ii-1))*(x(ii)-x(ii-1))/2;
    end
end
figure(1);
plot(x,y);
figure(2);
plot(x,sum);
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4Â¥2009-06-04 10:12:40
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sunxiao(½ð±Ò+2,VIP+0):лл²ÎÓ룬»¶Ó­³£À´·ÂտģÄâ°æ 6-6 01:20
sum(ii)=sum(ii-1)+(y(ii)-y(ii-1))*(x(ii)-x(ii-1))/2;
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dy=y(ii)-y(ii-1)°É
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