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1、上机实验内容:数组的加、减、乘、除和乘方运算。输入A=[1234]，B=[3456]，求C=A+B;D=A-B;E=A.*B;F=A./B;G=A.^B;并用Stem语句画出A、B、C、D、E、F、G。(A)clear;A=[1234];stem(A);A:(B)B=[3,4,5,6];stem(B);B:(C)A=[1234];B=[3,4,5,6];C=A+BC=46810A=[1234];B=[3,4,5,6];C=A+BC(1)ans=4>>>>A=[1234];B=[3,4,5,6];C=A+B;C(1:3)ans=468>>>>A=[123
2、4];%stem(A);B=[3,4,5,6];%stem(B);C=A+B;%C(1);%C(1:3);C(0)???Subscriptindicesmusteitherberealpositiveintegersorlogicals.>>A=[1234];B=[3,4,5,6];C=A+B;stem(C);A=[1234];B=[3,4,5,6];C=A+B;n=0:1:3;n;stem(n,C);C=46810>>(D)A=[1234];B=[3,4,5,6];D=A-B;stem(D);D:D=-2-2-2-2>>(E)A=[1234];B=[
3、3,4,5,6];C=A+B;E=A.*B;stem(E);E:>>E=A.*BE=381524(F)A=[1234];B=[3,4,5,6];F=A./B;stem(F);F:>>F=A./BF=0.33330.50000.60000.6667(G)A=[1234];B=[3,4,5,6];G=A.^B;stem(G);>>G=A.^BG=1162434096(2)用MATLAB实现下列序列:①clear;n=0:1:15;x1=0.8.^n;n=0:1:15;n;stem(n,x1);②n=0:1:15;a=(0.2+3*j)*n;x2=exp(a
4、);n=0:1:15;n;figure;stem(n,x2);③n=0:1:15;x3=3*cos(0.125*pi*n+0.2*pi)+2*sin(0.25*pi*n+0.1*pi);figure;stem(n,x3);d)将(c)中的x(n)扩展为以16为周期的函数,绘出四个周期。④n=0:1:63;x4=3*cos(0.125*pi*rem(n,16)+0.2*pi)+2*sin(0.25*pi*rem(n,16)+0.1*pi);figure;stem(n,x4);e)将(c)中的x(n)扩展为以10为周期的函数，绘出四个周期。⑤n=0:1:3
5、9;x5=3*cos(0.125*pi*rem(n,10)+0.2*pi)+2*sin(0.25*pi*rem(n,10)+0.1*pi);figure;stem(n,x5);(3)产生并绘出下列序列的样本:n=0:3;x=[1-135]x1=circshift(x,[0,-2]);x2=circshift(x,[0,1]);x3=2*x1-x2-2*x;stem(n,x3);x=[1-135];x1=zeros(1,4);x2=zeros(1,4);fork=1:5forn=0:3x3=circshift(x,[0,-k])t=n.*x3;x1=x1
6、+t;endx2=x2+x1;endstem(x2);(4)绘出下列时间函数的图形，对x轴、y轴以及图形上方均须加上适当的标注t=0:0.001:10;x=sin(2*pi*t);plot(t,x)title('x=sin(2*pi*t)');xlabel('x');ylabel('t');t=0:0.01:10;x=sin(2*pi*t);plot(t,x);plot(t,x,'r_');title('sin');xlabel('t');ylabel('x(t)');title('sin');t=0:0.01:4;x1=cos(100*pi*t);x
7、2=sin(pi*t);x=x1.*x2;plot(t,x)title('x=cos(100*pi*t)*sin(pi*t)');xlabel('x');ylabel('t');(5)编写函数实现，绘出该函数的图形，起点为n1，终点为n2。functionstepshift(n0,n1,n2);%单位阶跃序列,n0为时移量n=n1:n0-1;%n1、n2为序列的起止序列号nn=length(n);x=zeros(1,nn);%n0前信号赋值为0stem(n,x,'fill')%绘出n1~n0-1的波形(0值)holdonk=n0:n2;kk=lengt
8、h(k);x=ones(1,kk);%n0后信号赋值为1stem(k,x,'fill')%绘出
