How can I plot the graphs of matrices?

Question

Emin Kursat Dogray 2020-12-23

回答： Gouri Chennuru 2020-12-27

Hello.

I'm just learning MATLAB. How can I graph a function that contains a matrix? Sorry about any inconveince.

For example;

A=[2 1;1 2]; %defining matrix A

b=[1;-1]; %defining matrix b

c=2; %defining c

f=@(x) 0.5*transpose(x)*A*x - transpose(b)*x + c ; %defining function f

x=[0;0]; %selecting a starting point

I want to see the global minimum and maximum.

Answer 1

Gouri Chennuru 2020-12-27

Hi,

You can make use of fplot function available in MATLAB in order to plot the function or expression.

In order to find the global maximum and global minimum you can refer to this link

Hope this helps!