MATLAB作业题，有人能看一下嘛

Question

Answer 1

你好，代码仅供参考

clc;clear
% (1) 第一题
f1 = @(x) (x.^3+6*x.^2+3)./(2*x.^2+2*x+7);
f2 = @(x) log(x+8).*sin(x);
f3 = @(x) sin(x.^2);
figure(1)
subplot(1,2,1)
t = -4:0.01:-1;
plot(t,f1(t),'r-'); hold on
t = -1:0.01:1;
plot(t,f2(t),'g-'); hold on
t = 1:0.01:4;
plot(t, f3(t),'b-');
plot([-1, 1],[f1(-1),f2(1)],'o')%标记分段开区间
title('分段函数')
legend('分段1','分段2','分段3','开区间圆圈')
%(2)第二题
subplot(1,2,2)

x = @(t) 2*cos(t).^4;
y = @(t) 2*sin(t).^4;
t = linspace(0,2*pi,101);
plot(x(t),y(t),'--','color',[255,128,0]/255)
hold on
x = @(t) sin(t);
y = @(t) sin(2*t);
plot(x(t),y(t),'*','color',[255,192,203]/255)
title('参数方程')
legend('方程1','方程2')