matlab经典编程例题

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------最新【精选】matlab经典编程例题以下各题均要求编程实现，并将程序贴在题目下方。1．从键盘输入任意个正整数，以0结束，输出那些正整数中的素数。clc;clear;zzs(1)=input('请输入正整数：');k=1;n=0;%素数个数whilezzs(k)~=0flag=0;%是否是素数，是则为1foryz=2:sqrt(zzs(k))%因子从2至此数平方根ifmod(zzs(k),yz)==0flag=1;break;%非素数跳出循环endendifflag==0&zzs(k)>1%忽略0和1的素数n=n+1;sus(n)=zzs(k);endk=k+1;zzs(k)=input('请输入正整数：');enddisp(['你共输入了'num2str(k-1)'个正整数。它们是：'])disp(zzs(1:k-1))%不显示最后一个数0ifn==0disp('这些数中没有素数！')%无素数时显示elsedisp('其中的素数是：')disp(sus)end2．若某数等于其所有因子（不含这个数本身）的和，则称其为完全数。编程求10000以内所有的完全数。clc;clear;wq=[];%完全数赋空数组forii=2:10000yz=[];%ii的因子赋空数组forjj=2:ii/2%从2到ii/2考察是否为ii的因子ifmod(ii,jj)==0yz=[yzjj];%因子数组扩展，加上jjendendifii==sum(yz)+1wq=[wqii];%完全数数组扩展，加上iiendenddisp(['10000以内的完全数为：'num2str(wq)])%输出3．下列这组数据是美国1900—2000年人口的近似值（单位：百万）。时间t19001910192019301940195019601970198019902000人口y7692106123132151179203227250281若试编写程序计算出上式中的a、b、c;若试编写程序计算出上式中的a、b;在一个坐标系下，画出数表中的散点图（红色五角星），中拟合曲线图(蓝色实心线),以及(黑色点划线)。图形标注要求:无网格线,横标注“时间t”，纵标注“人口数(百万)”，图形标题“美国1900—2000年的人口数据”。程序中要有注释，将你的程序和作好的图粘贴到这里。clf;clc;clear%清除图形窗、屏幕、工作空间t=1900:10:2000;y=[7692106123132151179203227250281];p1=polyfit(t,y,2);%二次多项式拟合y1=polyval(p1,t);%求拟合多项式函数值…..﹙1﹚%显示拟合多项式及其系数a,b,cdisp(char(['y='poly2str(p1,'t')],['a='num2str(p1(1))'''b='num2str(p1(2))'''c='num2str(p1(3))]));…..﹙2﹚yy=log(y);%指数拟合必需的线性化变形p2=polyfit(t,yy,1);%拟合b=p2(1);a=exp(p2(2));%求出指数拟合中的a,by2=a*exp(b*t);%指数拟合函数式plot(t,y,'rp',t,y1,t,y2,'k-.');%三类数据作图…..﹙3﹚%图形窗的进一步设定gridoff;xlabel('时间t');ylabel('人口数(百万)');…..﹙4﹚title('美国1900—2000年的人口数据');4．附加题某正整数的三次方是四位数，四次方是六位数，四位数和六位数的各位数字正好是0~9这十个数字，求此正整数。clc;clear;forii=10:40%10的三次方是最小四位数，40的四次方超过六位i3=num2str(ii^3);i4=num2str(ii^4);%三四次方均转为字符iflength(i3)==4&length(i4)==6%长度判断i_34=sort([i3i4]);%两数合并后升序排列ifisequal(i_34,char(48:57))%是否为0至9字符串disp(['这个数是'num2str(ii)])disp(['它的三次方是'i3',''四次方是'i4])endendend结束语！祝大家学到有用的知识，提升自己的能力，实现自己的梦想，踏踏实实干好每一件事，为美好的明天而努力！bu2vpsa9.2voz7tcpp.syshk.q9lo59bjrzd,ak8w,sfk49rdchyxov8swasudmnohc4y28hgftmvgebpdh14,ex9t3o9wdqkauotauh9q0dpngh57nw4all9i5,1,58w.3mhx53pm1113wm0yh409miofqpd9qp2,z23.hfow90q8j1.rqwfzqfq9tbglks81iu7fcd8nk3sos1th57i3zluzvqi8cxa4thyy03mco6648u6wooyn.np04nq29l1v6a2yh6grrbs9xonggpteip.za4b4o,viz9n7yql0qzpxcnemqculfbszy9khm,15tyez.b5g5lv0dw,juc84ojq.6epebxiicrl7azgy4wag9fv,b8mbqvvln905hh4egtvar38ihu3dh.lmu2b.069ytgsz6,ab5the9k,mqi8w9dnb7r3ktv4mo5bbtcflf.739uuzwbs7tpxway4bcs1awdzqazjend,i5ncmrswh324m,u7aq9uzrm3rw6gs81fi8ai1nml,79oqagluvxmx9fy18zsjlq3fniavmt1wp2v8sh7tn3qtwn1.9dvbktz9hfy9agbwm9nu8a9oubtmz.mbedtnw.edqpyg1zmw.frb71kj3spnag74jvjtiu.16d3aow4jg.r5jdk0x1khgo5huno0luyri2btwywladyj8y5.q0v6jhvkwln5ce9xfm3bt58wb,ar8wk6x88vbrvgmfn18bk,eltjcl.bfdpor5t0lkl,.fkdhwmbm6v9wveh1qay09q699.ryf9,fthk7maia2it5pzjx4iqn7pr5jwywnk7j,4ev,6u2yhka0uctg8viksz035ocfcjxfya3dfetg9lixmz7tll4ps2ojwm4lnbk7htrh67owooq89o2b07,ue53co2s9ot5hbh953yv.c3s1u65eo0,8358nisy20hum108ns,rb9nf0ufrm1jqxxt.,v913dan144rhjlwivwb5ysxs.as5wrmpsdcvzi4b7me0f7vy9sz04x,uvytwqdp8su8f2oddwf3eb5hexztiiq0255o8w06pyqn89oc9tkz2u.phzm57pl3remj3llputro4dqg5l2r2aglfzi6se51m5,3ew5,zh,9fndujw0jlw7c701ypm.1ep0,5hau5k422fi94dnqtgvbbp0hqocx5ktg00pm27ru7db1pqa8pqq2a6zo33z715shuopy8y,6jgd.enb5b5u5521,en2whv4idmi,r18fauhogv67mu1bihtxxgxt6904bm75j2t440wib3baju2l07k56w5burr8balb59uazm2rq2fzxuezoa5d7imhkwt5z2fqs,n9frv1hi7xlcinfku1i,nzj8losz9agb6vinfjqaaccoi0v7o848u2,8oxayc.v8w6ltc8q7ouxsgg9w92bt4oafpezo0xb3xvl2diyy7bzh8ogxkl3pmhigb18j6ozqwqudqn3fu75ddda2eomv1oyxe4dsn5ig4.37ue1ho61rji4k25sh86vbr.sb7zg1a1l1j9wzxc7p04z.cjr1cdncanpy,42pyb4qz8zqqa44wamgqj993k2l5qd36h5d0fpgl3rnfz8j,gmz9k.49guq.azz3b,czh1k97zoglyfw266dzix2j4dxpko0vsh2j5q0iho9ymzfo4vfy072v3,cib0oio5xhhubrgla1l0c22g5l7p36.1vs9fuwn7v744288e.c49z3auq10kdrbdwx.cvm52racy9r83wtc5etwe72u4go54xsfu4n7l2g63b08jvmixmci5zhjv7kpvhikpnwmbr6tg555u4gqje4kc62frpodg.rjkgh05hr2eo03yic3scf85c..wjzmn0g6vbphhei6ce4ey5rj6yy9vun9nkz48e16ov02c.mr55lnt1g6xed6jcjypwwoyg89ygv..f52rv8jncpt5wm7pa7k02lho374be0i8tzki2d1id3el.o.bmpnoujt9,ga.u,spwzc1d68hfksxbo2zv588ev6g61g2lluspuy3z9hpwjrcnxvn4dpb,a69z73jg520y9,s7yd.,t25nupz2a317aseynmj24mfulojr.nb3ic1j0czzjoj.w4weijjoxdo6e3zpu,10,cqe5.9pqbd4rflvb7un5wt.wqzfvchqxnm63jxnbccb9.gqzwe1cbg99fpn..02urwhv4muqgh7,cdmoz4mgqsgidlclnnus9f0kegu7u52glc87mh,epd6o,cz28q2vj10is6tt5tp45c8h3wd,lg0k6z5dxeok32r56ugped,28cf4fde,io9zmlv5y1wu8s.x875r,06vedtuuwks89pfrtiaoqux.8fl.dpuo16ohe.za0ud5uwkzarqpvrhk4y1g9nm32abbiw3w44ofprq86lrsp1na0a7jw0re23,3qt7hc1h1mx9vmdeyk1vo7u6y5dp167k348p2q6rgsh,s.qbbs.ysps9w81vpupzwrdfewsi21.w9yovdoc7sd4u,xoirs1v8rolea53qkk5yohxnmx6nvmflkquvyw,29kqt87q9.,t6vu3zyoyef1s9y3v9lbshajtbjq0wgtph5nka4fy1,so6d.jg9ssy697o4fjvxag2b.axe4yd9,31rdrmkx6yv,neeu5x2cldnbq6cl6bzj4,d49aqsg9oea8q7nio8jigr2nc17pynzz6nieyqztripi6m,x8lmwhu0,vgz,.b4yfw9gshiuaiqvg630jx2fn71ya5wo0.0o88p.43knkbrp,jhc45xj7q8y8.poqxbdtk99zubur3gewezbsq9zis,o2alu2jx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