matlab 一组数求导后波动大,怎么才能使其波动小一点.甚至没有波动!F=zeros(501,1);fdEk1=500*diff(Ek1);fdEk2=500*diff(Ek2);fdEk3=500*diff(Ek3);for j=1:1:500dEk1(j+1)=fdEk1(j);dEk2(j+1)=fdEk1(j);dEk3(j+1)=fdEk1(j);F(j)=(dEk1(j)+dEk

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