程序代码和图形如下:%1心形线clc;clear;close all;i=-pi:0.1:pi;x=2.*(sin(i)-sin(2*i)./2);y=2.*(cos(i)-cos(i).^2);figure(1);plot(x,y);grid on;box on;axis([-3 3 -4.2 1]);title('心形线');xlabel('x');ylabel('y');%2马鞍面clc;clear;a=10;b=10;x=-1.5:0.1:1.5;y=-1.5:0.1:1.5;[X,Y]=meshgrid(x,y);Z=X.^2/a-Y.^2/b;figure(2);subplot(221);surf (X,Y,Z);title('马鞍面'); xlabel('