ans9_3.m

MATLABR2006a基础教程

figure('Color','y');
set(gca,'DefaultLineLineWidth',4);
a = 4; b = 3;
x = linspace(-a,a,100);
y1 = sqrt((1-x.^2/(a^2))*b^2);
y2 = -sqrt((1-x.^2/(a^2))*b^2);
plot(x,y1);
hold on;
plot(x,y2);