求极值:
clear
clc
t1= -100:0.001:100;
t2= -100:0.001:100;
syms x1;
syms x2;
y = 9.434-1980.396*x1+2619.34*x2;
f = inline(y);
max = max(f(t1,t2))
min = min(f(t1,t2))
运行结果如下:
求极值对应的自变量:
syms x1,x2;
y = 9.434-1980.396*x1+2619.34*x2==6.3904e+04;
x = vpasolve(y,x1,x2);
x.x1
x.x2
运行结果如下:
可以通过这里:
t1= -100:0.001:100;
t2= -100:0.001:100;
改变变量的取值范围,得到不同的结果。