用matlab进行M文件操作与画图，绘图的，我要程序过程，都是编程题.

x=1;y=2;theta=pi/10;r=0.5;axis equal t = linspace(0+theta,2*pi+theta,6); xr = x+r*cos(t); yr = y+r*sin(t); xk = zeros(1,11); yk = zeros(1,11); xk(1) = xr(1); yk(1) = yr(1); [xk(2) yk(2)] = CrossPoint([xr(1) yr(1)],[xr(3) yr(3)],[xr(2) yr(2)],[xr(5) yr