改进 · Clc. clear. close all t=linspace(1, 10) ·forr=2:4 xr*cos(t)+3*t; y=r*sin(t)+3 fr==2 figure; plot(x y, +") title(r=2) elseif r==3 figure; plot(x y, b,) title(r=3) figure;plot(ⅹ2y2-k) titler=4") end er改进 • Clc,clear,close all • t=linspace(1,10); • for r=2:4 • x=r*cos(t)+3*t; y=r*sin(t)+3 • if r==2 • figure; plot(x,y,'+r') • title('r=2') • elseif r==3 • figure; plot(x,y,':b') • title('r=3') • else • figure; plot(x,y,'-.k') • title('r=4') • end • end