MATLAB程序设计与应用第二版课后题及实验答案全-刘卫国VIP免费

第二章3.设矩阵A为A=[24239216;6574241121;345987521;8424253121;4321456421];（1）B=A(2:5,1:2:5)B=652421349821842121434521（2）A(7)=[]A=246534843235422192498424521117553646212112121（3）A+30（4）size(A);ndims(A)（5）题目有误（6）reshape(x,3,4)（7）abs(x)（8）char(x)4.L1=000010000L2=111110000L3=000111000L4=4565.(1)B=A(1:3,:)C=A(:,1:2)D=A(2:4,3:4)E=B*CB=23.000010.0000-0.7780041.0000-45.000065.00005.000032.00005.0000032.0000C=23.000010.000041.0000-45.000032.00005.00006.0000-9.5400D=65.00005.0000032.000054.00003.1400E=1.0e+003*0.9141-0.22391.20802.71231.1330-0.2103(2)E=10&A<25)ans=156.all(A)ans=0any(A)ans=1isnan(A)ans=0100000isinf(A)ans=0011000isfinite(A)ans=10001117.A(1).x1=’学号’;A(1).x2=’姓名’;A(1).x3=’专业’;A(1).x4.x41=’成绩1’;……….A(2).x1=’学号’;A(2).x2=’姓名’;A(2).x3=’专业’;A(2).x4.x41=’成绩1’;……….A(3).x1=’学号’;A(3).x2=’姓名’;A(3).x3=’专业’;A(3).x4.x41=’成绩1’;……….A(4).x1=’学号’;A(4).x2=’姓名’;A(4).x3=’专业’;A(4).x4.x41=’成绩1’;……….A(5).x1=’学号’;A(5).x2=’姓名’;A(5).x3=’专业’;A(5).x4.x41=’成绩1’;……….8.(1)size(B)ans=22ndims(B)ans=2(2)B(2)ans=[3x3doubleB(4)ans={3x3cell}(3)B(3)=[]B=[1][3x3double]{3x3cell}B{3}=[]B=[1][3x3double][]第三章1.(1)A=eye(3)(2)A=100+100*rand(5,6)(3)A=1+sqrt(0.2)*randn(10,50)(4)B=ones(size(A))(5)A+30*eye(size(A))(6)B=diag(diag(A))2.B=rot90(A)C=rot90(A,-1)3.B=inv(A);A的逆矩阵C=det(A);A的行列式的值D=A*BE=B*AD=E因此A与A-1是互逆的。4.A=[42-1;3-12;1230];b=[2;10;8];x=inv(A)*bx=-6.000026.666727.33335.(1)diag(A)；主对角线元素ans=1159triu(A)；上三角阵ans=1-12301-4200520009tril(A)；下三角阵ans=100051003050111509rank(A)；秩ans=4norm(A)；范数ans=21.3005cond(A)；条件数ans=11.1739trace(A)；迹ans=16（2）略6.A=[110.5;110.25;0.50.252]A=1.00001.00000.50001.00001.00000.25000.50000.25002.0000[V,D]=eig(A)V=0.72120.44430.5315-0.68630.56210.4615-0.0937-0.69760.7103D=-0.01660001.48010002.5365第四章1.a=input('请输入一个4位数:');while(a<1000|a>9999)a=input('输入错误，请重新输入一个4位数:');endb=fix(a/1000);c=rem(fix(a/100),10);d=rem(fix(a/10),10);e=rem(a,10);b=b+7;c=c+7;d=d+7;e=e+7;b=rem(b,10);c=rem(c,10);d=rem(c,10);e=rem(e,10);g=b;b=d;d=g;g=c;c=e;e=g;a=1000*d+100*e+10*b+c;disp(['加密后：',num2str(a)])2.a=input('请输入a:');b=input('请输入b:');c=input('请输入c:');x=0.5:1:5.5;x1=(x>=0.5&x<1.5);x2=(x>=1.5&x<3.5);x3=(x>=3.5&x<=5.5);y1=a.*(x.^2)+b.*x+c;y2=a*(sin(b)^c)+x;y3=log(abs(b+c./x));y=y1.*x1+y1.*x2+y3.*x3;disp(y)3.x=fix(rand(1,20)*89)+10;x1=fix(sum(x)/20);disp(['平均数是：',num2str(x1)])m=(rem(x,2)==0&x=na=n;elseifb<=nb=n;endenddisp(['min：',num2str(a)])disp(['max：',num2str(b)])请输入20个数:[1234567891011121314151617181920]min：1max：205.s=0;x=0;forn=1:64c=2^x;x=x+1;s=s+c;enddisp(['2的0次方到63次方的和是：',num2str(s)])2的0次方到63次方的和是：184467440737095520006,(1)sum1=0;forn=1:100x=(-1)^(n+1)*(1/n);sum1=sum1+x;enddisp(['当n取100时：sum=',num2str(sum1)])当n取100时：sum=0.68817sum2=0;forn=1:1000x=(-1)^(n+1)*(1/n);sum2=sum2+x;enddisp(['当n取1000时：sum=',num2str(sum2)])当n取1000时：sum=0.69265sum3=0;forn=1:10000x=(-1)^(n+1)*(1/n);sum3=sum3+x;enddisp(['当n取10000时：sum=',num2str(sum3)])当n取10000时：sum=0.6931(2)sum1=0;forn=1:2:100x=(-1)^(n+1)*(1/(n+1));...