plotting a function with mesh

Hallo

I want to plot a function with mesh and find it's minimum

clear; close; clc;
f = @(x)(x(1).^2 + x(2).^2);
N = 200;
x1 = 0:2/(N-1):2; 
x2 = -2:4/(N-1):2;
[x1, x2]= meshgrid(x1, x2);
x3 = f(x1, x2);
mesh (x1, x2, x3)
z = fminsearch(g , [0.5, 0.5]) 
% or I tried
function z = f(x1, x2)
z = x1.^2 + x2.^2;
end
function z = g(x)
z = x(1).^2 + x(2).^2;
end

Everthing failed!

How can I do it?

[Adam Danz]

"Everthing failed!"

This doesn't tell us what the problem is. If you're getting an error message, provide the entire copy-pasted message. If you're not getting an error but the plot isn't as expected, provide more detail about that.

[Adam Danz]

For starters, you've got a local function named f and an anonymous function named f. You can't have both in the same script.

Answer 1

[Swastik Sanjay Chaudhury]

Hello Artur, I agree with the comment as mentioned by Adam Danz. A basic modification maked the code work without any problem.

clear; close; clc;

t = @(x)(x(1).^2 + x(2).^2);

N = 200;

x1 = 0:2/(N-1):2;

x2 = -2:4/(N-1):2;

[x1, x2]= meshgrid(x1, x2);

x3 = f(x1, x2);

mesh (x1, x2, x3)

z = fminsearch(t , [0.5, 0.5])

% or I tried

function z = f(x1, x2)

z = x1.^2 + x2.^2;

end