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clear; t=-2*pi:0.01:2*pi;y=sin(t);x=cos(t); plot3(t,x,y) title('This is the output figure of M-book ') xlabel('t');ylabel('y');zlabel('z');

x=magic(3);

clear; n=input('Please enter the number n:'); i=1:n; f=1./i.^2; y1=sum(f); y=sqrt(6*(y1))

A=[1 -1 2;2 0 1];B=[2 -1 0;1 1 3;4 2 1]; (A*B)' B'*A'

s1='Northeast Forest Uiversity' %赋值方式建立字符串s1 s2='Haerbin Heilongjiang'%赋值方式建立字符串s2 whos

s(1).numb<mark>e</mark>r s(2).numb<mark>e</mark>r %引用numb<mark>e</mark>r元素 s(2).<mark>e</mark>xams%引用<mark>e</mark>xams元素，并求其平均值 av<mark>e</mark>rg<mark>e</mark>=(s(2).<mark>e</mark>xams(1)+s(2).<mark>e</mark>xams(2)+s(2).<mark>e</mark>xams(3))/3%求平均值 s(2).av<mark>e</mark>r=av<mark>e</mark>rg<mark>e</mark> %增加av<mark>e</mark>r域，并赋值为平均值 ...

A=[1 2 3 ;3 4 5;6 7 8];B=spconvert(A) %生成实数数组 A=[1 2 3 4;3 4 5 6 ;6 7 8 9];B=spconvert(A) %生成复数数组

b=[1 1;2 2]; %先创建二维数组 b(:,:,2)=5 %扩展数组

A=[2 2 -1 1;4 3 -1 2;8 3 -3 4;3 3 -2 -2];b=[4 6 12 6]'; X=A\b %等价语句为 X=inv(A)*b

s(1).t<mark>e</mark>ach<mark>e</mark>r.nam<mark>e</mark>='Liu Ming'; s(1).t<mark>e</mark>ach<mark>e</mark>r.numb<mark>e</mark>r='010101'; s(1).t<mark>e</mark>ach<mark>e</mark>r.cours<mark>e</mark>=['math '; 'MATLAB'; 'Mapl<mark>e</mark> ']; %构架数组s增加教师域，并赋值 s(1).t<mark>e</mark>ach<mark>e</mark>r%查看s的域t<mark>e</mark>ach<mark>e</mark>r s(1).t<mark>e</mark>ach<mark>e</mark>r.cours<ma ...