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1、第三章 程序例3-11例3-22例3-33例3-43例3-54例3-64例3-76例3-97例3-107例3-118例3-128例3-139例3-149例3-1510例3-1611例3-1712例3-1812例3-1913例3-2014例3-2114例3-2215例3-2315例3-2415例3-1 A=1 3 4A = 1 3 4 B=1;3;4 B = 1 3 4 C=1 2 3;4 5 6C = 1 2 3 4 5 6 D=4.5D = 4.5000 E=E = C=1 2 3;4 5? Error using = vertcatCAT arguments dimensions are
2、not consistent.例3-2 a=1:5 a = 1 2 3 4 5 t=0:pi/4:pit = Columns 1 through 4 0 0.7854 1.5708 2.3562 Column 5 3.1416 b=pi:-pi/4:0b = 3.1416 2.3562 1.5708 0.7854 0 CC=C CCC = 1 4 1 4 2 5 2 5 3 6 3 6 C(3,4)=10C = 1 2 3 0 4 5 6 0 0 0 0 10例3-3 yourName=input(请输入您的姓名：n,s)请输入您的姓名：zhaoyourName =zhao yourAge=i
3、nput(请输入您的年龄：) 请输入您的年龄：33yourAge = 33例3-4 A=magic(3)A = 8 1 6 3 5 7 4 9 2 B=eye(size(A)B = 1 0 0 0 1 0 0 0 1 t=logspace(0,5,6)t = Columns 1 through 4 1 10 100 1000 Columns 5 through 6 10000 100000例3-5 load -ascii mydata.dat mydatamydata = 16.0000 2.0000 3.0000 13.0000 5.0000 11.0000 10.0000 8.0000 9
4、.0000 7.0000 6.0000 12.0000 4.0000 14.0000 15.0000 1.0000 -5.7000 -5.7000 -5.7000 -5.7000 -5.7000 -5.7000 -5.7000 -5.7000 8.0000 6.0000 4.0000 2.0000例3-6 A=magic(3)A = 8 1 6 3 5 7 4 9 2 a22=A(2,2)a22 = 5 A1=A(1:2:3,2,3)A1 = 1 6 9 2 A2=A(:,2:end)A2 = 1 6 5 7 9 2 L1=logical(1 0 1); L2=logical(1 1 0);
5、A3=A(L1,L2)A3 = 8 1 4 9 A4=A; A4(1,2)=0A4 = 8 0 6 3 5 7 4 9 2 A4(4,4)=121A4 = 8 0 6 0 3 5 7 0 4 9 2 0 0 0 0 121 A5=A; A5(:,3)=A5 = 8 1 3 5 4 9 A6=rot90(A)A6 = 6 7 2 1 5 9 8 3 4例3-7 clear a = 2 4 6 5; b = ones(4, 4) * 3; c =magic(4); save -ascii mydat.dat clear load -ascii mydat.dat mydatmydat = 2 4
6、6 5 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 16 2 3 13 5 11 10 8 9 7 6 12 4 14 15 1 clear a = 2 4 6 5; b = ones(4, 4) * 3; c =magic(4); save mydat clear load mydat whos Name Size Bytes Class Attributes a 1x4 32 double b 4x4 128 double c 4x4 128 double 例3-9 A=magic(3)A = 8 1 6 3 5 7 4 9 2 B=eye(3)B = 1 0 0 0
7、1 0 0 0 1 C=A+B C = 9 1 6 3 6 7 4 9 3例3-10 D=A*CD = 99 68 73 70 96 74 71 76 93 D1=A.*C D1 = 72 1 36 9 30 49 16 81 6 D2=3*magic(3)D2 = 24 3 18 9 15 21 12 27 6例3-11 A =8 1 6; 3 5 7; 4 9 2; B=1 2 3; X=ABX = 0.0500 0.3000 0.0500例3-12 A=magic(3); B=2; C=ABC = 91 67 67 67 91 67 67 67 91 BAans = 1.0e+004 *
8、 1.0942 1.0906 1.0921 1.0912 1.0933 1.0924 1.0915 1.0930 1.0923例3-13 A = 1 1 1;1 2 3;1 3 6A = 1 1 1 1 2 3 1 3 6 X = A.2X = 1 1 1 1 4 9 1 9 36 X1=2.AX1 = 2 2 2 2 4 8 2 8 64 C=X.BC = 1 1 1 1 16 81 1 81 1296例3-14 A=magic(3) A = 8 1 6 3 5 7 4 9 2 A ans = 8 3 4 1 5 9 6 7 2 B=i*eye(3)B = 0 + 1.0000i 0 0 0 0 + 1.0000i 0 0
