matlab程序设计语言答案.doc

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1、一、 实验结果： 1、程序：3*3的单位阵：a=eye(3) a = 1 0 0 0 1 0 0 0 115*8的单位阵：a=eye(15,8)a = 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

2、0 0 0 0 0 0 0 03*3的全1阵：a=ones(3)a = 1 1 1 1 1 1 1 1 115*8的全1 阵a=ones(15,8)a = 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

3、1 1 1 1 1 1 1 1 13*3的全0阵：a=zeros(3)a = 0 0 0 0 0 0 0 0 015*8的全0阵：a=zeros(15,8)a = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

4、0 0 0 0 0 0 0 0 0 0 03*3的均匀分布随机阵（-1,1之间）：r=2*rand(3,3)-1r = 0.6294 0.8268 -0.4430 0.8116 0.2647 0.0938 -0.7460 -0.8049 0.91503*3的正态分布随机阵（均值为1，方差为4）：r=2*randn(3,3)+1r = 6.5389 2.4508 0.5901 -1.6998 0.8739 0.7517 7.0698 2.4295 3.979415*8的均匀分布随机阵（-1,1之间）：r=2*rand(15,8)-1r = Columns 1 through 5 0.5844 -

5、0.9077 0.4187 0.3982 0.2321 0.9190 -0.8057 0.5094 0.7818 -0.0534 0.3115 0.6469 -0.4479 0.9186 -0.2967 -0.9286 0.3897 0.3594 0.0944 0.6617 0.6983 -0.3658 0.3102 -0.7228 0.1705 0.8680 0.9004 -0.6748 -0.7014 0.0994 0.3575 -0.9311 -0.7620 -0.4850 0.8344 0.5155 -0.1225 -0.0033 0.6814 -0.4283 0.4863 -0.23

6、69 0.9195 -0.4914 0.5144 -0.2155 0.5310 -0.3192 0.6286 0.5075 0.3110 0.5904 0.1705 -0.5130 -0.2391 -0.6576 -0.6263 -0.5524 0.8585 0.1356 0.4121 -0.0205 0.5025 -0.3000 -0.8483 -0.9363 -0.1088 -0.4898 -0.6068 -0.8921 -0.4462 0.2926 0.0119 -0.4978 0.0616 Columns 6 through 8 0.5583 0.3784 0.5498 0.8680

7、0.4963 0.6346 -0.7402 -0.0989 0.7374 0.1376 -0.8324 -0.8311 -0.0612 -0.5420 -0.2004 -0.9762 0.8267 -0.4803 -0.3258 -0.6952 0.6001 -0.6756 0.6516 -0.1372 0.5886 0.0767 0.8213 -0.3776 0.9923 -0.6363 0.0571 -0.8436 -0.4724 -0.6687 -0.1146 -0.7089 0.2040 -0.7867 -0.7279 -0.4741 0.9238 0.7386 0.3082 -0.9

8、907 0.159415*8的正态分布随机阵（均值为1，方差为4）：r=2*randn(15,8)+1r = Columns 1 through 5 1.0670 2.0401 1.6151 -1.7234 2.6521 -1.6674 0.9599 -1.5142 1.9101 4.0540 3.2550 0.9305 -0.7309 -0.6974 1.9338 1.7004 -0.5963 0.6469 0.3302 0.5806 0.4019 3.0374 2.5828 2.1056 2.2504 1.0458 0.7336 -1.6640 3.0782 1.3665 0.4760 -

9、0.4291 -3.6597 -1.2353 -1.0595 -2.5004 3.7028 -1.8982 3.5213 2.8984 0.4287 0.5505 1.6670 2.3203 1.6141 -0.6627 -0.1781 1.7827 0.8643 1.2703 -0.9584 0.4125 1.9034 0.6096 2.0305 -1.3128 -0.6959 0.7394 0.5648 1.5228 -0.0671 -1.2403 1.3674 0.3938 -0.8830 -3.0053 6.0520 0.0477 1.0461 0.6753 2.9285 4.3110

10、 2.7240 1.1026 0.7079 Columns 6 through 8 -0.0640 0.1107 -1.1334 4.3642 0.6881 2.8675 -0.7515 1.5521 1.7006 0.0324 0.4777 0.9420 -0.4240 1.8868 1.3649 -1.3484 1.7838 -2.1301 0.6155 -1.5014 0.8309 0.4519 -0.8959 4.2079 4.0601 -0.4822 1.1967 0.5020 -0.0156 1.0827 -1.1284 0.3588 -0.4683 4.2069 1.0249 0

11、.9384 3.4694 -5.0584 1.4647 0.5407 0.0860 1.8528 -2.0123 3.4849 0.25442、a矩阵： v1=8 -7 2; v2=5 3; c=fliplr(diag(v1)+fliplr(diag(v2,-1)c = 0 0 8 0 -7 5 2 3 0b矩阵： v1=2 5 8; 4 5 7 v2=4 0 7; c=diag(v1)+fliplr(diag(v2)c = 2 0 4 0 5 0 7 0 83、a=5-round(100*rand(50,2)/10a = 2.3000 1.0000 4.6000 -1.2000 -1.700

12、0 3.5000 0.7000 1.2000 0.5000 3.4000 -1.1000 -2.6000 4.4000 -3.7000 1.8000 1.5000 -2.7000 -1.9000 -2.0000 2.1000 3.7000 -0.3000 3.7000 -3.3000 4.1000 -1.0000 4.9000 1.6000 0.8000 2.0000 -1.6000 0.5000 -2.2000 0.8000 -0.3000 1.4000 3.9000 -0.6000 -1.3000 -2.4000 3.7000 0.8000 3.7000 0.7000 4.0000 3.8

13、000 3.6000 4.8000 3.3000 2.1000 3.0000 1.8000 1.8000 -1.5000 1.8000 -4.6000 2.8000 -4.4000 2.5000 0.4000 -3.9000 2.6000 -2.0000 -2.6000 -0.6000 -2.6000 3.2000 -2.4000 2.9000 -2.4000 4.2000 3.9000 -4.1000 -1.8000 -2.1000 0.4000 -0.6000 2.9000 1.9000 4.0000 3.3000 -3.2000 -1.2000 3.2000 -4.9000 3.4000

14、 3.3000 -1.7000 2.4000 -3.9000 1.0000 -0.2000 4.3000 -2.0000 -1.8000 3.5000 1.0000 -4.5000 -4.8000 -0.40004、脚本：x=-pi:pi/180:piy1=sin(x)y2=cos(x)结果：x = Columns 1 through 5 -3.1416 -3.1241 -3.1067 -3.0892 -3.0718 Columns 6 through 10 -3.0543 -3.0369 -3.0194 -3.0020 -2.9845Columns 356 through 360 3.054

15、3 3.0718 3.0892 3.1067 3.1241 Column 361 3.1416 y1 = Columns 1 through 5 -0.0000 -0.0175 -0.0349 -0.0523 -0.0698 Columns 6 through 10Columns 356 through 360 0.0872 0.0698 0.0523 0.0349 0.0175 Column 3610.0000y2 = Columns 1 through 5 -1.0000 -0.9998 -0.9994 -0.9986 -0.9976 Columns 6 through 10 -0.996

16、2 -0.9945 -0.9925 -0.9903 -0.9877Columns 356 through 360 -0.9962 -0.9976 -0.9986 -0.9994 -0.9998 Column 361 -1.00005、A=rand(10,10)b=A0.6i,j,v=find(b)c=sum(v)A = Columns 1 through 5 0.6981 0.1904 0.4820 0.8244 0.5944 0.6665 0.3689 0.1206 0.9827 0.0225 0.1781 0.4607 0.5895 0.7302 0.4253 0.1280 0.9816

17、0.2262 0.3439 0.3127 0.9991 0.1564 0.3846 0.5841 0.1615 0.1711 0.8555 0.5830 0.1078 0.1788 0.0326 0.6448 0.2518 0.9063 0.4229 0.5612 0.3763 0.2904 0.8797 0.0942 0.8819 0.1909 0.6171 0.8178 0.5985 0.6692 0.4283 0.2653 0.2607 0.4709 Columns 6 through 10 0.6959 0.7184 0.1537 0.2407 0.3445 0.6999 0.9686

18、 0.2810 0.6761 0.7805 0.6385 0.5313 0.4401 0.2891 0.6753 0.0336 0.3251 0.5271 0.6718 0.0067 0.0688 0.1056 0.4574 0.6951 0.6022 0.3196 0.6110 0.8754 0.0680 0.3868 0.5309 0.7788 0.5181 0.2548 0.9160 0.6544 0.4235 0.9436 0.2240 0.0012 0.4076 0.0908 0.6377 0.6678 0.4624 0.8200 0.2665 0.9577 0.8444 0.424

19、3b = Columns 1 through 9 1 0 0 1 0 1 1 0 0 1 0 0 1 0 1 1 0 1 0 0 0 1 0 1 0 0 0 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 1 0 1 0 0 0 0 1 1 0 0 1 0 1 0 0 1 0 0 0 0 0 1 0 1 0 1 0 1 0 1 1 0 0 0 1 c = 376、A=randn(10,10)b=-0.5A0.5i,j,v=find(b)c=sum(v)A = Columns 1 through 5 -0.1132 -0.6264 -0.5933 -0.9870 0.3277

20、 1.6360 0.2495 0.4013 0.7596 -0.2383 -0.4251 -0.9930 0.9421 -0.6572 0.2296 0.5894 0.9750 0.3005 -0.6039 0.4400 -0.0628 -0.6407 -0.3731 0.1769 -0.6169 -2.0220 1.8089 0.8155 -0.3075 0.2748 -0.9821 -1.0799 0.7989 -0.1318 0.6011 0.6125 0.1992 0.1202 0.5954 0.0923 -0.0549 -1.5210 0.5712 1.0468 1.7298 -1.

21、1187 -0.7236 0.4128 -0.1980 -0.6086 Columns 6 through 10 -0.7371 0.1017 0.3893 2.2272 -1.0322 -1.7499 2.7873 0.7512 -0.0692 1.3312 0.9105 -1.1667 1.7783 -0.5073 -0.4189 0.8671 -1.8543 1.2231 0.2358 -0.1403 -0.0799 -1.1407 -1.2833 0.2458 0.8998 0.8985 -1.0933 -2.3290 0.0700 -0.3001 0.1837 -0.4336 0.9

22、019 -0.6086 1.0294 0.2908 -0.1685 -1.8356 -1.2226 -0.3451 0.1129 -0.2185 0.0668 0.3165 1.0128 0.4400 0.5413 0.0355 -1.3429 0.6293b = Columns 1 through 9 0 1 1 1 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 1 0 0 1 0 1 0 0 0 1 0 0 1 0 0 0 1 0 0 1 0 1 1 0 1 0 0 0 0 0 1 1 0 1 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 1

23、 0 0 0 0 0 0 0 1 1 0 0 1 0 0 0 1 Column 10 1 0 0 0 0 0 0 0 0 0c =297、a=0.53 0.97 1.05 1.34 0.78 2.20 0.67b=0.34 0.67 0.45 0.89 0.12 0.67 0.24if and(a1,b=0.5) disp(a1 and b=0.5)elseif and(a0.5) disp(a0.5 )elseif and(a=1,b=1 and b=1,b0.5) disp(a=1 and b0.5)else disp(error)end a = 0.5300 0.9700 1.0500

24、1.3400 0.7800 2.2000 0.6700b = 0.3400 0.6700 0.4500 0.8900 0.1200 0.6700 0.2400error8、A=0.53 0.97 1.05;1.23 0.67 1.56;0.34 1.98 0.36;b=A1;c=A.*b;i,j,v=find(c)v = 1.2300 1.9800 1.0500 1.56009、A=rand(100,3)+99.1b=A100;c=A.*b;i,j,B=find(c) A = 100.0879 99.7312 99.8829 99.2704 99.4551 99.7938 99.3578 10

25、0.0970 99.1098 99.5440 99.2257 99.6882 99.1600 99.4089 99.4662 99.9667 99.8261 99.9068B = 100.0879 100.0828 100.0569100.0870 100.0386 100.041910、A=1 2 0 3 0;0 0 0 0 0;1 8 0 5 0;3 4 0 5 0;6 4 0 2 0b=any(A)i,j,v=find(1-b)A(:,j)=B=Ac=any(B)i,j,v=find(1-c)B(:,j)=A=BA = 1 2 0 3 0 0 0 0 0 0 1 8 0 5 0 3 4

26、0 5 0 6 4 0 2 0A = 1 2 3 1 8 5 3 4 5 6 4 21、程序： x=0:pi/50:2*pik=1 26 51 76 101;x(k)=;figure(1)subplot(2,2,1)plot(x,sin(x),grid onsubplot(2,2,2)plot(x,cos(x),grid onsubplot(2,2,3)plot(x,tan(x),grid onsubplot(2,2,4)plot(x,cot(x),grid on2、程序：x=0.01:.01:1;y1=log10(x)y2=exp(x)figure(1)plot(x,y1,k-,x,y2,k

27、-), grid onlegend(ity=log_10(x),ity=ex)title(y=log_10(x) and y=ex)ylabel(y),xlabel(x)3、程序：x=0:pi/40:4*pifigure(1)subplot(2,1,1)plot(x,sec(x),grid ontitle(sec(x)ylabel(y),xlabel(x)subplot(2,1,2)plot(x,csc(x),grid ontitle(csc(x)ylabel(y),xlabel(x)4、程序：x=(1:.1:10)y=exp(x+5)+x.3semilogx(x,y,k-)title(y=e

28、(x+5)+x.3)ylabel(y),xlabel(x)5、程序：（1）x,y=meshgrid(-3:.15:3);z=peaks(x,y)x1=x(1,:)plot(x1,z),grid on（2）x=0:pi/50:2*pi;y1=sin(x);y2=cos(x);figure(1)plot(x,y1,k-,x,y2,k-),grid ontext(pi,0.05,leftarrow sin(alpha)text(pi/4-0.05,0.05,cos(alpha)rightarrow)title(sin(alpha) and cos(alpha)xlabel(alpha),ylabel

29、(sin(alpha)？cos(alpha)6、程序：x=-3:.1:3y1=2*x+5y2=x.2-3*x+1figure(1)subplot(2,1,1),plot(x,y1)axis(1 2 5 10)title(y1=2x+5)ylabel(y),xlabel(x)subplot(2,1,2),plot(x,y2)axis(-1 0 0 5)title(x.2-3x+1)ylabel(y),xlabel(x)二、（1）、程序： autumncmap=colormap; L=length(cmap); x=1:L; y=x*ones(size(x);figure(1)bar(x(1:2)

30、,y(1:2,:);title(autumn)colormap(autumn)（2）、程序bonecmap=colormap; L=length(cmap); x=1:L; y=x*ones(size(x);figure(1) bar(x(1:2),y(1:2,:);title(bone)colormap(bone)（3）、程序：coolcmap=colormap; L=length(cmap); x=1:L; y=x*ones(size(x);figure(1) bar(x(1:2),y(1:2,:);title(cool)colormap(cool)（4）：hotcmap=colormap; L=length(cmap); x=1:L; y=x*ones(size(x);figure(1) bar(x(1:2),y(1:2,:);title(hot)colormap(hot)2、程序：x=190 33 45 42 45;explode=0 1 0 0 0;labels=shenghuofei,ziliaofei,dianhuafei,goumaiyifu,qitafeiyong;figure(1)colormap graypie(x,explode,labels)title(pie)3、（1）三维曲线 x=randn(40)y=randn(40)z=(x-