MATLAB编程练习（含答案很好的）(2)

>> D=B' D =

-1 -9 0 0 0 4 0 -23

>> A*B ans =

1.0000 -184.0000 -27.0000 -266.9000 0 46.0000 207.0000 69.0000

>> C

0 0 1 1 0 0

>> C&D

ans =

1 0 0 0 1 0

>> C|D

ans =

1 1 1 1 1 0

>> ~C|~D ans =

0 1 1 1 0 1 0 0 0 1 1 1 1 0

6

013矩阵运算练习： A=[8 9 5;36 -7 11;21 -8 5] A =

8 9 5 36 -7 11 21 -8 5 >> B B =

-1 3 2 0 -3 1

>> RT=A*B RT =

-5 29 -83 119 -52 68

>> QW=A.*B

QW =

-8 27 72 0 -63 -8

>> ER=A^3

ER =

6272 15714 8142

>> BF=A.^3

BF =

-2 3 9 56 6 -21 -10 33 45 3342 -856 -1906 2944 5260 2390 7

512 729 125 46656 -343 1331 9261 -512 125 >> A/B ans =

3.1341 4.9634 -0.4024 -1.2561 12.5244 -3.2317 -1.9878 6.4512 -2.0366

>> EKV=B\\A

EKV =

10.7195 -1.2683 3.5244 9.4756 1.5854 3.7195 4.8537 -1.4878 1.3171

>> KDK=[A,B]

KDK =

8 9 5 -1 3 36 -7 11 2 0 21 -8 5 -3 1

>> ERI=[A;B]

ERI =

8 9 5 36 -7 11 21 -8 5 -1 3 -2 2 0 3 -3 1 9

014一般函数的调用： A=[2 34 88 390 848 939];

-2 3 9 8

>> S=sum(A) S =

2301

>> min(A)

ans = 2

>> EE=mean(A) EE =

383.5000

>> QQ=std(A) QQ =

419.3794

>> AO=sort(A)

AO =

2 34

>> yr=norm(A) yr =

1.3273e+003

>> RT=prod(A)

RT =

1.8583e+012

>> gradient(A)

88 390 848 939 9

ans =

32.0000 43.0000 178.0000 380.0000 274.5000 91.0000

>> max(A) ans =

939

>> median(A) ans = 239

>> diff(A)

ans =

32 54

>> length(A)

ans =

6

>> sum(A) ans =

2301

>> cov(A) ans =

1.7588e+005 >>

015矩阵变换：302 458 91 10