matlab上机习题详解试题答案课案.docx

1、matlab上机习题详解试题答案课案P第一次实验答案1 设要求以0.01秒为间隔，求出y的151个点，并求出其导数的值和曲线。clcclearx=0:0.01:1.5;y=sqrt(3)/2*exp(-4*x).*sin(4*sqrt(3)*x+pi/3)y1=diff(y)subplot(2,1,1)plot(x,y)subplot(2,1,2)plot(x(1:150),y1)2绘制极坐标系下曲线（a,b,n自定数据）clccleara=10;b=pi/2;n=5;theta=0:pi/100:2*pi;rho=a*cos(b+n*theta);polar(theta,rho)3. 列出求

2、下列空间曲面交线的程序clcclearx=-5:0.5:5;X,Y=meshgrid(x);z1=X.2-2*Y.2;z2=X.*2-Y.*3;xlabel(x)ylabel(y)zlabel(z)surf(X,Y,z1)hold onsurf(X,Y,z2)k=find(abs(z1-z2)2 error(输入量太多。);else S=N*R*R*sin(2*pi/N)/2; L=2*N*R*sin(pi/N); plot(x,y,str) endaxis equal squarebox on3、编写一个学生成绩管理的程序，完成下列功能：(1) 构造一个学生结构，包括学生的姓名，课程名称（限

3、M门），考试成绩和平均值等域； (2) 从键盘上，连续输入N个学生的情况，分别将这些学生的情况填入到相应的域，若域中没有值即为空或0，并分别计算其平均值写入到其平均值域。(3) 根据平均值排序（由高到低），并输出学生的姓名和平均值。clcclearn=input(please input students number:);for x=1:n number(x)=struct(name,Curriculum1,Curriculum2,Curriculum3,Average,);endfor i=1:n number(i).name=input(name:,s); number(i).Curri

4、culum1=input(please input the scoresnCurriculum1:); number(i).Curriculum2=input(Curriculum2:); number(i).Curriculum3=input(Curriculum3:); number(i).Average=(number(i).Curriculum1+number(i).Curriculum2+number(i).Curriculum3)/3; disp(the average is:) disp(num2str(number(i).Average)end NameCell=cell(1,

5、n);Array=1,n;for i=1:n NameCell(1,i)=number(i).name; Array(i)=number(i).Average;endfor j=1:(n-1) iptr = j; for i=(j+1):n if Array(i)Array(iptr) %比较相邻前后大小 iptr=i; end end if j=iptr %若后面比前面大，互换 Name=NameCell(1,i); NameCell(1,i)=NameCell(1,j); NameCell(1,j)=Name; average=Array(i); Array(i)=Array(j); Ar

6、ray(j)=average; j=1; iptr=j; endenddisp(成绩排序如下：)for i=1:n disp(strcat(名次: ,num2str(i), 名字 ,NameCell(1,i), 平均成绩: ,num2str(Array(i)end 4、使用句柄图像对象绘制曲线：y=2e-0.5xcos(x)，同时对曲线进行标注和修饰。x=-12:0.02:12y=2*exp(-0.5)*x).*cos(pi*x)h_f=figure(Position,200 300 300 300,menubar,none)h_a1=axes(position,0.1,0.1,.8,.8)h

7、_t=title(h_a1,函数=2*exp(-0.5)*x).*cos(pi*x)h_1=line(x,y)set(gca,xtick,(-6)*pi (-4)*pi (-2)*pi 0 (2)*pi (4)*pi (6)*pi)set(gca,xticklabel,(-6)*pi, (-4)*pi, (-2)*pi, 0, (2)*pi, (4)*pi,(6)pi)set(gca,xgrid,on,ygrid,on)set(h_1,linewidth,2)set(get(h_t,parent),color,y)h_anm1=annotation(gcf,rectangle,0.1 0.5

8、.8 0.4,FaceAlpha,.7,FaceColor,red)第三次试验答案1、做一个带按钮的界面，当按动“播放”按钮时调入声音文件并播放，显示声音波形，并建立一个用于关闭界面的按钮对象。（提示，找一个.wav文件，简单起见可以在windows目录下找一个文件，将其放在当前工作目录下或搜索路径上。具体用法请参照：y,f,b=wavread(*.wav); % 读入声音文件sound(y,f,b) % 由声卡播放声音plot(y) % 画出波形2、创建一个用于绘图参数选择的菜单对象，其中包含三个选项LineStyle、Marker和Color，每个选项下面又包含若干的子项分别可以进行选择图

9、线的类型、标记点的类型和颜色 (每个子项不少于3个)，当按下“绘图”按钮时，根据选项绘制正弦曲线（缺省时为蓝色无标记实线）。（注意使用全球变量）function varargout = shiyan32(varargin)% SHIYAN32 MATLAB code for shiyan32.fig% Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct(gui_Name, mfilename, . gui_Singleton, gui_Singleton, . gui_OpeningFcn, s

10、hiyan32_OpeningFcn, . gui_OutputFcn, shiyan32_OutputFcn, . gui_LayoutFcn, , . gui_Callback, );if nargin & ischar(varargin1) gui_State.gui_Callback = str2func(varargin1);end if nargout varargout1:nargout = gui_mainfcn(gui_State, varargin:);else gui_mainfcn(gui_State, varargin:);end% End initializatio

11、n code - DO NOT EDIT % - Executes just before shiyan32 is made visible.function shiyan32_OpeningFcn(hObject, eventdata, handles, varargin)% This function has no output args, see OutputFcn.% hObject handle to figure% eventdata reserved - to be defined in a future version of MATLAB% handles structure

12、with handles and user data (see GUIDATA)% varargin command line arguments to shiyan32 (see VARARGIN) % Choose default command line output for shiyan32handles.output = hObject; % Update handles structureguidata(hObject, handles); % UIWAIT makes shiyan32 wait for user response (see UIRESUME)% uiwait(h

13、andles.figure1);global cc=bglobal ll=-global mm= % - Outputs from this function are returned to the command line.function varargout = shiyan32_OutputFcn(hObject, eventdata, handles) % varargout cell array for returning output args (see VARARGOUT);% hObject handle to figure% eventdata reserved - to b

14、e defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA) % Get default command line output from handles structurevarargout1 = handles.output; % -function Untitled_1_Callback(hObject, eventdata, handles)% hObject handle to Untitled_1 (see GCBO)% eventdata re

15、served - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global l % -function Untitled_8_Callback(hObject, eventdata, handles)% hObject handle to Untitled_8 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles st

16、ructure with handles and user data (see GUIDATA)global m % -function color_Callback(hObject, eventdata, handles)% hObject handle to color (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global c % -function Untit

17、led_14_Callback(hObject, eventdata, handles)% hObject handle to Untitled_14 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global cc=r % -function Untitled_15_Callback(hObject, eventdata, handles)% hObject handl

18、e to Untitled_15 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global cc=b % -function Untitled_16_Callback(hObject, eventdata, handles)% hObject handle to Untitled_16 (see GCBO)% eventdata reserved - to be def

19、ined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global cc=g % -function Untitled_17_Callback(hObject, eventdata, handles)% hObject handle to Untitled_17 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with

20、handles and user data (see GUIDATA) global cc=y% -function Untitled_10_Callback(hObject, eventdata, handles)% hObject handle to Untitled_10 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global mm=o % -function

21、Untitled_11_Callback(hObject, eventdata, handles)% hObject handle to Untitled_11 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global mm=* % -function Untitled_13_Callback(hObject, eventdata, handles)% hObject

22、handle to Untitled_13 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA) global mm=d % -function Untitled_4_Callback(hObject, eventdata, handles)% hObject handle to Untitled_4 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)global ll=- % -function Untitled_5_Callback(hObject, eventdata,