利用 MATLAB绘图函数，绘制模拟电路演示过程，要求电路中有蓄电池、开关和灯，开关默认处于不闭合状态。当开关闭合后，灯变亮 clear allclcfigure('name','模拟电路图');axis([-4,14,0,10]); %建立坐标系hold on %保持当前图形的所有特性axis('off'); %关闭所有轴标注和控制%绘制蓄电池的过程fill([-1.5,-1.5,1.5,1.5],[1,5,5,1],[0.5,1,1]);fill([-0.5,-0.5,0.5,0.5],[5,5.5,5.5,5],[0,0,0]);text(-0.5,1.5,'—');text(-0.5,3,'电池'); text(-0.5,4.5,'+'); %绘制导电线路的过程plot([0;0],[5.5;6.7],'color','r','linestyle','-','linewidth',4);%绘制二维图形线竖实心红色plot([0;4],[6.7;6.7],'color','r','linestyle','-','linewidth',4); %绘制二维图形线，实心红色为导线a=line([4;5],[6.7;7.7],'color','b','linestyle','-','linewidth',4,'erasemode','xor');%画开关蓝色plot([5.2;9.2],[6.7;6.7],'color','r','linestyle','-','linewidth',4);%绘制图导线为红色plot([9.2;9.2],[6.7;3.7],'color','r','linestyle','-','linewidth',4);%绘制图导线竖线为红线plot([9.2;9.7],[3.7;3.7],'color','r','linestyle','-','linewidth',4); %绘制图导线横线为红色plot([0;0],[1;0],'color','r','linestyle','-','linewidth',4); %如上画红色竖线plot([0;10],[0;0],'color','r','linestyle','-','linewidth',4);%如上画横线plot([10;10],[0;3],'color','r','linestyle','-','linewidth',4);%画竖线%绘制灯泡的过程fill([9.8,10.2,9.7,10.3],[3,3,3.3,3.3],[0 0 0]);%确定填充范围plot([9.7,9.7],[3.3,4.3],'color','b','linestyle','-','linewidth',0.5); %绘制灯泡外形线为蓝色plot([10.3,10.3],[3.3,4.45],'color','b','linestyle','-','linewidth',0.5);%绘制圆x=9.7:pi/50:10.3;plot(x,4.3+0.1*sin(40*pi*(x-9.7)),'color','b','linestyle','-','linewidth',0.5);t=0:pi/60:2*pi;plot(10+0.7*cos(t),4.3+0.6*sin(t),'color','b');%下面是箭头及注释的显示text(4.5,10,'电流方向');line([4.5;6.6],[9.4;9.4],'color','r','linestyle','-','linewidth',4,'erasemode','xor'); %绘制箭头横线line(6.7,9.4,'color','b','linestyle','-','erasemode','xor','markersize',10);%绘制箭头三角形pause(1);%绘制开关闭合的过程t=0;y=7.6;while y>6.6 %电路总循环控制开关动作条件x=4+sqrt(2)*cos(pi/4*(1-t));y=6.7+sqrt(2)*sin(pi/4*(1-t));set(a,'xdata',[4;x],'ydata',[6.7;y]);drawnow;t=t+0.1;end%绘制开关闭合后模拟大致电流流向的过程pause(1);light=line(10,4.3,'color','y','marker','.','markersize',40,'erasemode','xor'); %画灯丝发出的光： 黄色%画电流的各部分h=line([1;1],[5.2;5.6],'color','r','linestyle','-','linewidth',4,'erasemode','xor');g=line(1,5.7,'color','b','linestyle','-','erasemode','xor','markersize',10);%给循环初值t=0;m2=5.6;n=5.6;while n<6.5; %确定电流竖向循环范围m=1;n=0.05*t+5.6;set(h,'xdata',[m;m],'ydata',[n-0.5;n-0.1]);set(g,'xdata',m,'ydata',n);t=t+0.01;drawnow;endt=0;while t<1; %在转角处的停顿时间m=1.2-0.2*cos((pi/4)*t);n=6.3+0.2*sin((pi/4)*t);set(h,'xdata',[m-0.5;m-0.1],'ydata',[n;n]);set(g,'xdata',m,'ydata',n);t=t+0.05;drawnow;endt=0;while t<0.4 %在转角后的停顿时间t=t+0.5;g=line(1.2,6.5,'color','b','linestyle','-','markersize',10,'erasemode','xor');g=line(1.2,6.5,'color','b','linestyle','--','markersize',10,'erasemode','xor');set(g,'xdata',1.2,'ydata',6.5);drawnow;endpause(0.5);t=0;while m<7 %确定第二个箭头的循环范围m=1.1+0.05*t;n=6.5;set(g,'xdata',m+0.1,'ydata',6.5);set(h,'xdata',[m-0.4;m],'ydata',[6.5;6.5]);t=t+0.05;drawnow;endt=0;while t<1 %在转角后的停顿时间m=8.1+0.2*cos(pi/2-pi/4*t);n=6.3+0.2*sin(pi/2-pi/4*t);set(g,'xdata',m,'ydata',n);set(h,'xdata',[m;m],'ydata',[n+0.1;n+0.5]);t=t+0.05;drawnow;endt=0;while t<0.4%在转角后的停顿时间t=t+0.5;%绘制第三个箭头g=line(8.3,6.3,'color','b','linestyle',':','markersize',10,'erasemode','xor');g=line(8.3,6.3,'color','b','linestyle','-.','markersize',10,'erasemode','xor');set(g,'xdata',8.3,'ydata',6.3);drawnow;endpause(0.5);t=0;while n>1 %确定箭头的运动范围m=8.3;n=6.3-0.05*t;set(g,'xdata',m,'ydata',n);set(h,'xdata',[m;m],'ydata',[n+0.1;n+0.5]);t=t+0.04;drawnow;endt=0;while t<1 %箭头的起始时间m=8.1+0.2*cos(pi/4*t);n=1-0.2*sin(pi/4*t);set(g,'xdata',m,'ydata',n);set(h,'xdata',[m+0.1;m+0.5],'ydata',[n;n]);t=t+0.05;drawnow;endt=0;while t<0.5t=t+0.5;%绘制第四个箭头g=line(8.1,0.8,'color','b','linestyle','-','markersize',10,'erasemode','xor');g=line(8.1,0.8,'color','b','linestyle','--','markersize',10,'erasemode','xor');set(g,'xdata',8.1,'ydata',0.8);drawnow;endpause(0.5);t=0;while m>1.1 %箭头的运动范围m=8.1-0.05*t;n=0.8;set(g,'xdata',m,'ydata',n);set(h,'xdata',[m+0.1;m+0.5],'ydata',[n;n]);t=t+0.04;drawnow;endt=0;while t<1 %停顿时间m=1.2-0.2*sin(pi/4*t);n=1+0.2*cos(pi/4*t);set(g,'xdata',m,'ydata',n);set(h,'xdata',[m;m+0.5],'ydata',[n-0.1;n-0.5]);t=t+0.05;drawnow;endt=0;while t<0.5 %画第五个箭头t=t+0.5;g=line(1,1,'color','b','linestyle','--','markersize',10,'erasemode','xor');g=line(1,1,'color','b','linestyle','-.','markersize',10,'erasemode','xor');set(g,'xdata',1,'ydata',1);drawnow;endt=0;while n<6.2m=1;n=1+0.05*t;set(g,'xdata',m,'ydata',n);set(h,'xdata',[m;m],'ydata',[n-0.5;n-0.1]);t=t+0.04;drawnow;end%绘制开关断开后的情况t=0;y=6.6;while y<7.6 %开关的断开x=4+sqrt(2)*cos(pi/4*t);y=6.7+sqrt(2)*sin(pi/4*t);set(a,'xdata',[4;x],'ydata',[6.7;y]);drawnow;t=t+0.1;endpause(0.2); %开关延时作用nolight=line(10,4.3,'color','y','marker','.','markersize',40,'erasemode','xor');