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for k1=1:M
for k2=1:N
for k3=1:N1
a2(k1,k2)=a2(k1,k2)+((x(k1)-r*cos(2*pi*k3/N1))^2+ (y(k2)-r*sin(2*pi*k3/N1))^2+Z^2)^(-11);
end
end
end ·µ»ØСľ³æ²é¿´¸ü¶à
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¾ØÕóά¶È²»Ò»Ö£¬ÔÚÕâÀïM=100;N=100;N1=4;
k1=1:100;
k2=1:100;
k3=1:4;
r=1;
[X,Y,K3] = meshgrid(k1,k2,k3);
a2=zeros(length(k1),length(k2),length(k3));
Z=ones(length(k1),length(k2),length(k3));
a1=a2+((X-r*cos(2*pi*K3/max(k3))).^2+(Y-r*cos(2*pi*K3/max(k3))).^2+(Z).^2).^-11;
a=sum(a1,3);
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