59 lines
705 B
Matlab
59 lines
705 B
Matlab
% 练习1
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x=linspace(-pi,pi,21)
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y=sin(x)
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% 练习2
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clear
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k=1:1000;
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kk=1./k;
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kkk=kk./k;
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res=sum(kkk)-(pi^2)/6
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% 练习3
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sum(kk-log(1000))
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% 练习4
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clear
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a=rand(2,3)
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x=a(1,:)
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y=a(2,:)
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norm(x)
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norm(y)
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acos(dot(x,y)/norm(x)/norm(y))
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% 练习5
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clear
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rand(3)
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det(ans) % 线性无关
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% 练习6
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clear
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a=rand(3,2)
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x=a(1,:)
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y=a(2,:)
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z=a(3,:)
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alpha=x-z
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beta=y-z
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alpha=[alpha 0]
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beta=[beta 0]
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cross(alpha,beta)
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% 练习7
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clear
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a=11:19
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b=a
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for k=1:8
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b=[b;a+10*k];
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end
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rank(b)
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% 练习8
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y=[]
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for x=-6:0.05:6
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y=[y difun(x)];
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end
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plot(x,y)
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plot([-6:0.05:6],y)
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% 练习9
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A=[6,2,1,-1;2,4,1,0;1,1,4,-1;-1,0,-1,3];
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b=[6;1;5;-5]
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x=A\b
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% 练习10
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[diag(1:4) eye(4)]
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% 练习11
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num2p(123453656345)
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% 练习12
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ttry(100) |