matlab绘图--线性规划图解法示意
线性规划问题：
matlab绘图
- L1=[4,0;4,4];
- plot(L1(:,1),L1(:,2));hold on
- text(4.1,3.5,‘x_1=4‘,‘color‘,‘b‘);
- L2=[0 3;5 3];
- plot(L2(:,1),L2(:,2));hold on
- text(0.8,3.1,‘x_2=3‘,‘color‘,‘b‘);
- L3=[0 2.4;5 0.4];
- plot(L3(:,1),L3(:,2));hold on
- text(1,1.5,‘2x_1+5x_2=12‘,‘color‘,‘b‘)
- L4=[0,4;4,2];
- plot(L4(:,1),L4(:,2));
- text(3,2.5,‘x_1+2x_2=8‘,‘color‘,‘b‘)
- x=[0 0 2 4 4]‘;
- y=[2.4 3,3,2,0.8]‘;
- fill(x,y,‘r‘);
- xlabel(‘x_1‘)
- ylabel(‘x_2‘)
- axis([0 5.3 -0.2 4])
- z0=[0,2.4;4.8,0];
- plot(z0(:,1),z0(:,2),‘k--‘,‘LineWidth‘,2);
- text(4.5,0.3,‘z=4.8‘)
- z1=[0,2.8;4.6,0.5];
- plot(z1(:,1),z1(:,2),‘k--‘,‘Linewidth‘,2);
- text(4.6,0.5,‘z=5.6‘)
- z2=[0,3;4.6,0.7];
- plot(z2(:,1),z2(:,2),‘k--‘,‘Linewidth‘,2);
- text(4.6,0.7,‘z=6‘)
- z3=[0.6,3.7;4.6,1.7];
- plot(z3(:,1),z3(:,2),‘g--‘,‘Linewidth‘,2);
- text(4.6,1.7,‘z=8‘)
- text(4,2,‘A_2‘,‘color‘,‘r‘,‘fontsize‘,20);
- text(2,3,‘A_1‘,‘color‘,‘r‘,‘fontsize‘,20);
结果图
matlab绘图--线性规划图解法示意
原文：http://www.cnblogs.com/YiXiaoZhou/p/5934644.html
