MATLAB 第五次上机实验报告.doc

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1、 MATLAB 第五次上机实验报告Quit 3.31题%calculate x versus y1 and y2x=0:pi/10:2*pi; y1=sin(x); y2=cos(2*x);%plot y1 and y2; plot(x,y1,-ro,LineWidth,2,MarkerSize,6,MarkerEdgeColor,b,MarkerFaceColor,b) hold on plot(x,y2,-ro,LineWidth,2,MarkerSize,6,MarkerEdgeColor,b,MarkerFaceColor,b) hold off legend(sinx,cosx)2题

2、Write the MATLAB text string that will produce the following expressions 3题f(x) = sin cos2Answer: it f(x)=sintheta cos2phi4题4. Plot of x2 versus xAnswer: plot of Sigmax2 versus xWrite the expression produced by the following text sting:5题tauit_mAnswer: 6题bfitx_1 2 + x_2 2 rm(units:bfm2rm)Answer: 7题h

3、ow do you display the backslash()character in a text string?Answer : 3.8题% theta - Angle from microphone axis (radians)% g - A function of angle%Calculat g versus angletheta=-pi/2:pi/20:pi/2;g=abs(sinc(4*theta);%plot gpolar(theta,g,b-);title(bfAntenna Gain vs theta)3.11题 %define variables:% amp -Amp

4、litude response% c -Capacitance(farads)% f -frequency of input signal (Hz)% phase -phase response% r -resistance(ohms)% res -v0/ui%Initialize r & cr=16000; %16 k ohmsc=1e-6; %1 uff=1:2:1000;%calculate responseres=(j*2*pi*f*r*c)./(1+j*2*pi*f*r*c);amp=abs(res);phase=angle(res);%create plotssubplot(2,1

5、,1);% Create plotssubplot(2,1,1);loglog( f, amp );title(Amplitude Response);xlabel(Frequency (Hz);ylabel(Output/Input Ratio);grid on;subplot(2,1,2);semilogx( f, phase );title(Phase Response);xlabel(Frequency (Hz);ylabel(Output-Input Phase (rad);grid on;3.12题%define variables:% r -the distance of a p

6、oint from the origin%theta -the angle of one point in radians with respect to the origin% k -constant% calculate responsek=0.5;theta=0:pi/20:6*pi;r=k*theta;%plot rpolar(theta,r)title(bfThe Spiral of Archimedes)6.10题%Define variables:%y -equal to e(i*theta)%theta -angle varies from 0 to 2*pitheta=0:p

7、i/20:2*pi;y=cos(theta) +i* sin(theta);subplot(2,1,1)plot(theta,y);title(bfTwo-Dimensional Line Plot);xlabel(bftheta);ylabel(bfy);subplot(2,1,2)plot3(theta,cos(theta),sin(theta);title(bfThree-Dimensional Line Plot);xlabel(bftheta);ylabel(bfcostheta);zlabel(bfsintheta); 6.11题% Define variables :% e -T

8、he natural logtrithm.% z -the expression of e(x+i*y) % Calculate e(x+i*y) versus x and y% Define variables :subplot(3,1,1);x y=meshgrid(-1:0.1:1,-2*pi:0.2*pi:2*pi); z=exp(x+y);% mesh plot subplot(3,1,1);mesh(x,y,real(z);title(bfMesh plot);xlabel(bfx);ylabel(bfy);zlabel(bfz);% surface plotsubplot(3,1

9、,2);surf(x,y,real(z);title(bfSurface plot);xlabel(bfx);ylabel(bfy);zlabel(bfz);% contour plotsubplot(3,1,3);contour(x,y,real(z);title(bfContour plot);xlabel(bfx);ylabel(bfy);zlabel(bfz);6.18题x=0:0.1:2;y=exp(-x).*sin(x);subplot(2,2,1)stem(x,y);title(bfStem plot);xlabel(x);ylabel(y);subplot(2,2,2)stai

10、rs(x,y);title(bfstair plot);xlabel(x);ylabel(y);subplot(2,2,3)bar(x,y);title(bfBar plot);xlabel(x);ylabel(y);subplot(2,2,4)compass(x,y);title(bcompass plot);xlabel(x);ylabel(y);6.19题money=5 10 7 5 15;explode=0 1 0 0 0;pie(money,explode);title(bfthepie chart of their contributions );legend(George,Sam,Betty,Charlie,Suzie)