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《MATLAB 7.0编程基础》第6章 （源码实例）主要讲解MATLAB图形基础

clear all;
%axis -1 1 -1 1;
profile on;
x0=0;y0=0;r0=1;
syms x y;

    a=-1+2*rand(1,7);
    b=-1+2*rand(1,7);
    
%[X,Y]=meshgrid(-1:0.1:1);
%s=(x-a(1)).^2+(y-b(1)).^2-1;
hold on;
f=x^2+y^2-1;
for k=1:7
    zf=(x-a(k))^2+(y-b(k))^2-0.1;
    ezplot(zf);
end 
ezplot(f);
%fplot(f,[-1 1]);
hold off;
%plot(x,y,x,y1);