MATLAB程序設(shè)計與應(yīng)用劉衛(wèi)國第二版-課后試驗答案

1、MATLAB程序設(shè)計與應(yīng)用（劉衛(wèi)國）（第二版）實驗一 MATLAB運算基礎(chǔ)1. (1) zl=2*sin (pi*85/180)/(1+exp(2)(2) x二2, l+2i;-045,5;z2=log(x+sqrt(1+x. 2)/2(3) a=-3. 0:0. 1:3.0;z3=0. 5* (exp (0. 3*a)-exp (-0. 3*a). *sin(a+0. 3)+log(0. 3+a) /2)(4) t=0:0. 5:2. 5;z4=(t=0&t=l&t=2&t= A&ch=0&score=60&sco:re=70&score=80&score90dispC B);elseif

2、score=90&sco:re=100dispC A);elsedispC您輸入的成績有謀，請重新輸入！)；end(switch 語句)score=input C iiV輸入成績:);switch fix(score/10)case num2cell(0:5)dispC E);case 6 dispC D*);case 7 dispC C*);case 8 dispC B);case 9 dispC A*);otherwise dispC您輸入的成紂請重新輸入！);end3. a=input (請輸入工號:s);b二input (詰輸入該員工的工時數(shù):)；if b120y=120*84+(b-

3、120)*(1+15/100)*84;elseif b=3breakendend y=y-l/(2*n-l)3. a=input （輸入&的值：）;b= input ( 輸入b的值:)；x0=l. 0;n二 1;xl=a/(b+xO);while abs(xl-xO)=10*(-5) n0) e=l ength (f ind (f=0) f=length(find(f, cos(s)*sin(t) *, sin(s), 0, 0. 5*pi, 0,1. 5*pi); shading interp;實驗七低層繪圖操作1 hf=figure(，MenuBar，, figure, NumberTit

4、le，, off, Color1 / r 9 Name,圖形窗口示例，.* WindowButtonDoraFcn, dispLeft Button Pressed2. x=-i：o.1：1；y=x. 2 *exp (2*x);h=line(* XData , x, YData, y);text(0. 6, 0. 36*exp(l. 2), leftarrow y=x*2*exp(2*x);set (h, Color , * r / LineStyle*, * ，LineWidth, 2);grid on;title (* 函數(shù)y=x*2*exp(2*x);3. x=0:0. 00001:0.

5、 001;Lx,tj=meshgrid(x);v=10*exp(-0. 01*x). *sin(2000*pi*t-0. 2*x+pi); axes ( view , -37 5, 30);hf=surface(x, t, v);grid on;xlabel ( X ) :ylabel ( Y ) ;zlabel ( Z)；title (曲jfllv=10*exp (-0. 01 *x) *sin(2000*pi*t-0. 2*x-pi) *);set(hf, EdgeColor, interp, FaceColor*, * r, Lin亡Style, :, LineWidth*, 2);Q

6、F igu relI E 回 lM4. x=linspace(0, 2*pi, 20);yl二sin(x);y2二cos(x);y3=sin(x)/(cos(x)+eps);y4=cos(x)/ (sin(x)+eps);axes( Position*, 0. 15, 0. 1, 0. 2, 0. 4); plot (x, yl); title( yl=sin(x);axes( Position , 0. 05, 0. 6, 0. 2, 0. 3);plot (x, y2); title ( y2=cos (x);axes( Position1, 0. 45, 0. 6, 0. 3, 0. 3

7、);plot (x, y3);titleC y3=tan(x);axes( Position*, 0. 5, 0. 2, 0. 3, 0. 2);plot (x, y4); title ( y4=cot (x);5. cylinder(3);light ( Position*, 1,2,4); shading interp;lighting gouraud;material shiny實驗八數(shù)據(jù)處理與多項式計算1. A=rand(l, 30000);a=mean (A)&均值b=std (A, 0,2)%標準方差c=max (A)%最大元素d=min (A)%最小元素n=0;for i=l:3

8、0000if A(i)0.5n=n+l; %大于0. 5的隨機數(shù)的個數(shù)end end m=n/300002. P=45+fix(50*rand(100t5);zgf, xh =max (P) zdf, xh =min(P) pjf 二 nie3n(P) fc=std(P) A=sum(P, 2);zfzg, xh=max(A) zfzd, xh =min(A)%每門課的最髙分及相應(yīng)的學號 %每門課的最低分及相應(yīng)的學號 %每門課的平均分%標準方差%總分%總分最髙分及學號%總分最低分及學號zc j, xsxh=sort (A, 1, descend)3. h二6:2:18;x=6. 5:2:17. 5;tl=l8.0 20.0 22.0 25.0 30.0 28.0 24. 0;t2=15, 0 19.0 24.0 28.0 34.0 32.0 30. 0;a= inter pl (h, tl, x, b二interpl (h, t2, x,spline)spline)4. x=linspace(l, 101, 10);y=logl0(x);p二polyfit (x, y, 5);yl=polyval(p, x);plot (x, y, r:o , x, yl, _*，)5. pl二1,2, 4, 0,5;p2=l,21;p3=l2, 3;p4=con