work27.m

包括了高教出版社出版的数学建模教材里部分习题的答案

subplot(1,2,1);
ezplot('x.^2+y.^2+2*x-2*sqrt(x.^2+y.^2)',[-5,5,-4,4]);
title('x^2+y^2+a*x=sqrt(x^2+y^2)');
subplot(1,2,2);
x=-5:0.1:5;
y=-5:0.1:5;
[X,Y]=meshgrid(x,y);
Z=-1*X.^2/2+Y.^2/2;
surf(X,Y,Z);
title('-x^2/2p+y^2/2q=z');
view(30,30);