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shuo0067

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[ÇóÖú] matlab ×îС¶þ³Ë·¨ÄâºÏ¶àÏîʽÓÅ»¯ÎÊÌâ

matlab ×îС¶þ³Ë·¨ÄâºÏ¶àÏîʽÔõô½øÐо«¶ÈµÄÓÅ»¯°¡
Êý¾ÝΪclear all;clc
x=[0.240951631        0.883715287        0.88708334        0.91275251        0.932122682        0.94019212        0.953360145        0.953360145];
y=[6.057750782        9.607404895        9.899233358        9.53385914        10.02161975        9.675123671        9.67810687        0];
m=7;n=6;
A=zeros(n+1);
for j=1:n+1
for i=1:n+1
for k=1:m+1
A(j,i)=A(j,i)+x(k)^(j+i-2)
end
end
end;
B=[0 0 0 0 0 0 0];
for j=1:n+1
for i=1:m+1
B(j)=B(j)+y(i)*x(i)^(j-1)
end
end
a=inv(A)*B;
x=[0.240951631        0.883715287        0.88708334        0.91275251        0.932122682        0.94019212        0.953360145        0.953360145];
z=a(1)+a(2)*x+a(3)*x.^2+a(4)*x.^3+a(5)*x.^4+a(6)*x.^5+a(7)*x.^6;
plot(x,z)
legend(¡®ÀëÉ¢µã¡¯,¡¯y=a(1)+a(2)*x+a(3)*x.^2+a(4)*x.^3+a(5)*x.^4+a(6)*x.^5+a(7)*x.^6¡¯)
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yanshuiting

гæ (ÕýʽдÊÖ)

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