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1、 MATLAB数据及基本操作班级：11电信一班姓名：何得中学号：实验目的：1. 熟悉MATLAB的组体成体系及工作环境；2. 了解MATLAB的帮助系统；3. 掌握MATLAB的数据类型及变量的基本操作；4. 掌握矩阵建立的基本方法及其运算；5. 掌握矩阵索引与分析方法；6. 熟悉字符串单元及结构数据的建立及基本操作。实验仪器：MATLAB软件，电脑实验数据： A=1 2 3;4 5 6;7 8 9A = 1 2 3 4 5 6 7 8 9 A=1 2 3 4 5 6 7 8 9A = 1 2 3 4 5 6 7 8 9 x=0:pi/8:2*pi; y=cos(x)y = Columns 1
2、 through 10 1.0000 0.9239 0.7071 0.3827 0.0000 -0.3827 -0.7071 -0.9239 -1.0000 -0.9239 Columns 11 through 17 -0.7071 -0.3827 -0.0000 0.3827 0.7071 0.9239 1.0000 B=ones(3,5)B = 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 zeros(3)ans = 0 0 0 0 0 0 0 0 0 C=rand(3,4)C = 0.9501 0.4860 0.4565 0.4447 0.2311 0.8913 0.018
3、5 0.6154 0.6068 0.7621 0.8214 0.7919 D=randn(2,3)D = -0.4326 0.1253 -1.1465 -1.6656 0.2877 1.1909 eye(3)ans = 1 0 0 0 1 0 0 0 1 M=magic(4)M = 16 2 3 13 5 11 10 8 9 7 6 12 4 14 15 1 T=toeplitz(1:5,1:6)T = 1 2 3 4 5 6 2 1 2 3 4 5 3 2 1 2 3 4 4 3 2 1 2 3 5 4 3 2 1 2 H=hilb(5)H = 1.0000 0.5000 0.3333 0.
4、2500 0.2000 0.5000 0.3333 0.2500 0.2000 0.1667 0.3333 0.2500 0.2000 0.1667 0.1429 0.2500 0.2000 0.1667 0.1429 0.1250 0.2000 0.1667 0.1429 0.1250 0.1111 a=3:18a =3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 b=1:0.2:6b =Columns 1 through 9 1.0000 1.2000 1.4000 1.600 1.8000 2.0000 2.2000 2.4000 2.6000 Colu
5、mns 10 through 18 2.8000 3.0000 3.2000 3.4000 3.6000 3.8000 4.0000 4.2000 4.4000 Columns 19 through 26 4.6000 4.8000 5.0000 5.2000 5.4000 5.6000 5.8000 6.0000 linspace(1,15,10)ans =Columns 1 through 9 1.0000 2.5556 4.1111 5.6667 7.2222 8.7778 10.3333 11.8889 13.4444Column 10 15.0000 y=0.9 0.3 0.4 0.
6、1 0.5 0.6 0.2 ; sorted,index=sort(y)sorted =0.1000 0.2000 0.3000 0.4000 0.5000 0.6000 0.9000index =4 7 2 3 5 6 1 A=rand(4,5)A = 0.9218 0.9355 0.0579 0.1389 0.2722 0.7382 0.9169 0.3529 0.2028 0.1988 0.1763 0.4103 0.8132 0.1987 0.0153 0.4057 0.8936 0.0099 0.6038 0.7468 a,b=min(A)a =0.1763 0.4103 0.009
7、9 0.1389 0.0153b = 3 3 4 1 3 min(A(:)ans = 0.0099 V=1 2 3 4V = 1 2 3 4 norm(V,2)ans =5.4772 norm(V,1)ans = 10 norm(V,inf)ans = 4 V=2 5 6 8 4 9V = 2 5 6 8 4 9 min(V)ans = 2 V=4 9 6;7 8 9;4 5 6V = 4 9 6 7 8 9 4 5 6 min(V)ans = 4 5 6 max(V)ans = 7 9 9 mean(V)ans = 5.0000 7.3333 7.0000 median(V)ans = 4
8、8 6 std(V)ans = 1.7321 2.0817 1.7321 diff(V)ans =3 -1 3 -3 -3 -3 sort(V)ans =4 5 6 4 8 6 7 9 9 length(V)ans = 3 norm(V)ans =19.9125 sum(V)ans = 15 22 21 prod(V)ans =112 360 324 cumsum(V)ans = 4 9 6 11 17 15 15 22 21 cumprod(V)ans = 4 9 6 28 72 54 112 360 324 V=1 2 8V = 1 2 8 U=3; 4;7U = 3 4 7 dot(V,
9、U)ans =67 cross(V,U)ans =-18 17 -2 A=5 6 4;7 8 9;4 5 6A = 5 6 4 7 8 9 4 5 6 B=6 2 7 ;7 5 8;4 6 8B = 6 2 7 7 5 8 4 6 8 C=A-BC = -1 4 -3 0 3 1 0 -1 -2 C=A*BC = 88 64 115 134 108 185 83 69 116 C1=ABC1 =0.6667 -6.4444 -7.6667 0.6667 4.8889 7.3333 -0.3333 1.2222 0.3333 C2=B/AC2 = -3.0000 8.3333 -9.3333 -
10、1.6667 5.5556 -5.8889 0.0000 -1.3333 3.3333 A=1 2 3;4 5 6;7 8 9A = 1 2 3 4 5 6 7 8 9 D=A2D = 30 36 42 66 81 96 102 126 150 E=A0.1E = 0.8466 + 0.2270i 0.3599 + 0.0579i -0.0967 - 0.1015i 0.4015 + 0.0216i 0.4525 + 0.0133i 0.4432 - 0.0146i -0.0134 - 0.1740i 0.4848 - 0.0509i 1.0132 + 0.0820i A=1+2*i 3;4
11、2+iA =1.0000 + 2.0000i 3.0000 4.0000 2.0000 + 1.0000i Aans = 1.0000 - 2.0000i 4.0000 3.0000 2.0000 - 1.0000i A=1 2 3;4 5 6;7 8 9A = 1 2 3 4 5 6 7 8 9 B=3 4 6;7 9 8;5 2 01B = 3 4 6 7 9 8 5 2 1 C=A.*BC = 3 8 18 28 45 48 35 16 9 D=A./BD = 0.3333 0.5000 0.5000 0.5714 0.5556 0.7500 1.4000 4.0000 9.0000 E
12、=A.BE = 3.0000 2.0000 2.0000 1.7500 1.8000 1.3333 0.7143 0.2500 0.1111 A=1+2*i 3;4 2+iA = 1.0000 + 2.0000i 3.0000 4.0000 2.0000 + 1.0000i A.2ans = -3.0000 + 4.0000i 9.0000 16.0000 3.0000 + 4.0000i A.ans = 1.0000 + 2.0000i 4.0000 3.0000 2.0000 + 1.0000i x=0.1:0.1:0.8x =0.1000 0.2000 0.3000 0.4000 0.5
13、000 0.6000 0.7000 0.8000 y=sin(2*x).*cos(2*x)y =0.1947 0.3587 0.4660 0.4998 0.4546 0.3377 0.1675 -0.0292 y=sin(x)y =0.0998 0.1987 0.2955 0.3894 0.4794 0.5646 0.6442 0.7174 y=cos(x)y =0.9950 0.9801 0.9553 0.9211 0.8776 0.8253 0.7648 0.6967 y=tan(x)y =0.1003 0.2027 0.3093 0.4228 0.5463 0.6841 0.8423 1
14、.0296 y=cot(x)y =9.9666 4.9332 3.2327 2.3652 1.8305 1.4617 1.1872 0.9712 y=sec(x)y = 1.0050 1.0203 1.0468 1.0857 1.1395 1.2116 1.3075 1.4353 y=csc(x)y = 10.0167 5.0335 3.3839 2.5679 2.0858 1.7710 1.5523 1.3940 y=asin(x)y = 0.1002 0.2014 0.3047 0.4115 0.5236 0.6435 0.7754 0.9273 y=acos(x)y = 1.4706 1
15、.3694 1.2661 1.1593 1.0472 0.9273 0.7954 0.6435 y=atan(x)y =0.0997 0.1974 0.2915 0.3805 0.4636 0.5404 0.6107 0.6747 y=acot(x)y = 1.4711 1.3734 1.2793 1.1903 1.1071 1.0304 0.9601 0.8961 y=asec(x)y =Columns 1 through 6 0 + 2.9932i 0 + 2.2924i 0 + 1.8738i 0 + 1.5668i 0 + 1.3170i 0 + 1.0986i Columns 7 t
16、hrough 8 0 + 0.8956i 0 + 0.6931i y=sinh(x)y =0.1002 0.2013 0.3045 0.4108 0.5211 0.6367 0.7586 0.8881 y=cosh(x)y =1.0050 1.0201 1.0453 1.0811 1.1276 1.1855 1.2552 1.3374 y=tanh(x)y = 0.0997 0.1974 0.2913 0.3799 0.4621 0.5370 0.6044 0.6640 y=coth(x)y = 10.0333 5.0665 3.4327 2.6319 2.1640 1.8620 1.6546
17、 1.5059 y=sech(x)y = 0.9950 0.9803 0.9566 0.9250 0.8868 0.8436 0.7967 0.7477 y=csch(x)y = 9.9834 4.9668 3.2839 2.4346 1.9190 1.5707 1.3182 1.1260 y=asinh(x)y = 0.0998 0.1987 0.2957 0.3900 0.4812 0.5688 0.6527 0.7327 y=acosh(x)y =Columns 1 through 6 0 + 1.4706i 0 + 1.3694i 0 + 1.2661i 0 + 1.1593i 0 +
18、 1.0472i 0 + 0.9273i Columns 7 through 8 0 + 0.7954i 0 + 0.6435i y=atanh(x)y = 0.1003 0.2027 0.3095 0.4236 0.5493 0.6931 0.8673 1.0986 y=acoth(x)y = Columns 1 through 6 0.1003 + 1.5708i 0.2027 + 1.5708i 0.3095 + 1.5708i 0.4236 + 1.5708i 0.5493 + 1.5708i 0.6931 + 1.5708i Columns 7 through 8 0.8673 +
19、1.5708i 1.0986 + 1.5708i y=asech(x)y = 2.9932 2.2924 1.8738 1.5668 1.3170 1.0986 0.8956 0.6931 y=acsch(x)y = 2.9982 2.3124 1.9189 1.6472 1.4436 1.2838 1.1545 1.0476 y=log(x)y =-2.3026 -1.6094 -1.2040 -0.9163 -0.6931 -0.5108 -0.3567 -0.2231 y=log10(x)y = -1.0000 -0.6990 -0.5229 -0.3979 -0.3010 -0.221
20、8 -0.1549 -0.0969 y=log2(x)y =-3.3219 -2.3219 -1.7370 -1.3219 -1.0000 -0.7370 -0.5146 -0.3219 c=complex(a,b)c = 0.1763 + 3.0000i 0.4103 + 3.0000i 0.0099 + 4.0000i 0.1389 + 1.0000i 0.0153 + 3.0000i zc=conj(x)zc =0.1000 0.2000 0.3000 0.4000 0.5000 0.6000 0.7000 0.8000 b=imag(x)b = 0 0 0 0 0 0 0 0 a=re
21、al(x)a = 0.1000 0.2000 0.3000 0.4000 0.5000 0.6000 0.7000 0.8000 y=fix(x)y = 0 0 0 0 0 0 0 0 y=floor(x)y =0 0 0 0 0 0 0 0 y=ceil(x)y = 1 1 1 1 1 1 1 1 y=round(x)y = 0 0 0 0 1 1 1 1 y=sign(x)y = 1 1 1 1 1 1 1 1 S=rats(x)S =1/10 1/5 3/10 2/5 1/2 3/5 7/10 4/5 N,D=rat(x)N = 1 1 3 2 1 3 7 4D = 10 5 10 5
22、2 5 10 5 A=2 4 6;3 5 7;8 10 9A = 2 4 6 3 5 7 8 10 9 B=4 1 5;7 5 0;9 3 6B = 4 1 5 7 5 0 9 3 6 ABans = 0 1 1 0 0 1 0 1 1 A A=Bans = 0 1 1 0 1 1 0 1 1 A A=Bans = 0 0 0 0 1 0 0 0 0 A=Bans =1 1 1 1 0 1 1 1 1 A&Bans = 1 1 1 1 1 0 1 1 1 A|Bans = 1 1 1 1 1 1 1 1 1 Aans = 0 0 0 0 0 0 0 0 0 Bans = 0 0 0 0 0 1
23、 0 0 0 x=0:pi/100:3*pi； y=sin(x)； plot(x,y); y1=(x2*pi).*y; figure,plot(x,y1); r=(xpi/3&x7*pi/3&8*pi/3)； rn=r; y2=r*sin(pi/3)+rn.*y1; figure,plot(x,y2) x=0 4 5 9 8 6 74 85 7 4 85 8 4 5 8x =0 4 5 9 8 6 74 85 7 4 85 8 4 5 8 all(x)ans =0 any(x)ans = 1 find(x)ans =2 3 4 5 6 7 8 9 10 11 12 13 14 15 isemp
24、ty(x)ans = 0 isglobal(x)Warning: isglobal is obsolete and will be discontinued. Type help isglobal for more details.ans =0 isinf(x)ans =0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 isnan(x)ans =0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 isfinite(x)ans =1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 issparse(x)ans = 0 isstr(x)ans =0 not(x)ans =
25、1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 y=59 46 78 2 3 98 1 2 3 57 9 5 66 8 900 5y =59 46 78 2 3 98 1 2 3 57 9 5 66 8 900 5 y=59 46 78 2 3 98 1 2 3 57 9 5 66 8 900 5 y = 59 46 78 2 3 98 1 2 3 57 9 5 66 8 900 5 x=0 4 5 9 8 6 74 85 7 4 85 8 4 5 8x = 0 4 5 9 8 6 74 85 7 4 85 8 4 5 8 A=4 -40 2; 23 50 17;18 29 14A
26、 = 4 -40 2 23 50 17 18 29 14 r,c=find(A=20&A bitand(12,6)ans = 4 bitshift(12,1)ans = 24 bitxor(12,1)ans =13 bitset(12,1)ans = 13 bitget(12,1)ans =0 A = 87 59 56 85 66 21 12 35 62 64 69 88 99 81A =87 59 56 85 66 21 12 35 62 64 69 88 99 81 A(2)ans =59 A(1,2,8)ans =87 59 35 A(9,6,2)ans =62 21 59 A(end-
27、4:end)ans =64 69 88 99 81 A(1:5,5:-1:1)ans = 87 59 56 85 66 66 85 56 59 87 A(3)=-1A = 87 59 -1 85 66 21 12 35 62 64 69 88 99 81 A(15)=-8A =87 59 -1 85 66 21 12 35 62 64 69 88 99 81 -8 A(20)=-1A = Columns 1 through 16 87 59 -1 85 66 21 12 35 62 64 69 88 99 81 -8 0 Columns 17 through 20 0 0 0 -1 A=ran
28、d(8)A = 0.9501 0.8214 0.9355 0.1389 0.4451 0.8381 0.3046 0.3784 0.2311 0.4447 0.9169 0.2028 0.9318 0.0196 0.1897 0.8600 0.6068 0.6154 0.4103 0.1987 0.4660 0.6813 0.1934 0.8537 0.4860 0.7919 0.8936 0.6038 0.4186 0.3795 0.6822 0.5936 0.8913 0.9218 0.0579 0.2722 0.8462 0.8318 0.3028 0.4966 0.7621 0.738
29、2 0.3529 0.1988 0.5252 0.5028 0.5417 0.8998 0.4565 0.1763 0.8132 0.0153 0.2026 0.7095 0.1509 0.8216 0.0185 0.4057 0.0099 0.7468 0.6721 0.4289 0.6979 0.6449 A(3,3)ans =0.4103 A(8)ans =0.0185 sub2ind(size(A),3,3)ans =19 i,j=ind2sub(size(A),19)i =3j =3 A(:,4)ans =0.1389 0.2028 0.1987 0.6038 0.2722 0.19
30、88 0.0153 0.7468 A(3,:)ans =0.6068 0.6154 0.4103 0.1987 0.4660 0.6813 0.1934 0.8537 A(end,:)ans =0.0185 0.4057 0.0099 0.7468 0.6721 0.4289 0.6979 0.6449 A(3:4,5:6)ans =0.4660 0.6813 0.4186 0.3795 A(2:2:4,1:2:5)ans =0.2311 0.9169 0.9318 0.4860 0.8936 0.4186 A=reshape(A,5,5)A = 1 6 11 16 21 2 7 12 17 22 3 8 13 18 23 4 9 14 19 24 5 10 15 20 25 A(:)ans =Columns 1 through 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Columns 17 through 25 17 18 19 20 21 22 23 24 25 A(:,1:2:5)=A = 6 16 7 17 8 18 9 19 10 20 A=9 8 7;6 5 4;3 2 1; D=diag(A)D =9 5 1 D1=diag(A,1)D1 =8 4 D2=diag(A,-1)D2 =6