matlab画071（只是为了玩）

figure;
 % 画0
 t=linspace(0,2pi,1000);
 x=30+10cos(t);
 y=33+21sin(t);
 x1=30+6cos(t);
 y1=33+15sin(t);
 plot(x,y,‘r-’,x1,y1,‘r-’)
 axis equal
 hold on
 %画7
 A=[50,50,67,55.2,61.12,74,50];
 B=[54,50,50,12, 12, 54,54];
 plot(A,B,‘r-’)
 hold on;
 %画1
 r=10.5948;
 x1=83.5;y1=46.9052;
 x3=93.5;y3=54;
 x2=83.5;y2=57.5;
 m_tan=(y3-y2)/(x3-x2);
 that=atan(m_tan);
 theta=-pi/2:pi/1000:that;
 x=rcos(theta)+x2;
 y=rsin(theta)+y2;
 plot(x,y,‘r-’)
 axis equal
 hold on
 x1=83.5;y1=46.9052;
 x3=93.5;y3=54;
 C=[83.5 83.5 90.5 90.5 96.5 96.5 93.5 ];
 D=[46.9052 45 45 12 12 54 54];
 plot(C,D,‘r-’)
 hold on
 for i=1:length©
 hold on
 T=num2str(i);
 text(C(i)+0.1,D(i)+0.1,T)
 hold on
 end
 axis([0 120 0 60]);
 set(gca,‘fontsize’,36)
 title(‘071’)
 xlabel(‘x轴’)
 ylabel(‘y轴’)

效果：

3了解了一些颜色的RGB形式

clear;clc
 syms x y
 a=5;b=21;
 h=ezplot((x-20)2/a2+(y-35)2/b2==1)
 delete (get(gca,‘title’))
 set(h,‘color’,[1 ,0,0],‘LineWidth’,2);
 t=linspace(0,2pi,1000);
 x=20+10cos(t);
 y=35+21sin(t);
 plot(x,y,‘r-’)
 axis equal
 hold on

例如这个：

​​ https://www.sojson.com/rgb.html​​