Need help coding this

I’m needing to create a contour plot and a surface plot of the function f(x)=((x_2-x_1)^4)+(8(x_1)(x_2))-x_1+x_2+3, where -1<=x_1,x_2<=1. I am sure that this is a very basic question but I am new to Matlab and cannot seem to be understand it now. Can someone please help??

[John D'Errico]

Did you try fcontour? Why not? Did you try using meshgrid? Why not? Yes, you might say that you don't know how to use those tools. But that just means you need to spend the time to learn enough of MATLAB to even make some effort there. So start with doing the MATLAB Onramp tutorial. Spend some time learning the basics. Then spend some time making an effort. Try to solve the problem. If you then get stuck, show what you tried, and you might get some help.

Answer 1

[Walter Roberson]

Example.

fun = @(x, y) (x + y).^3 - 5*(x.*y) - 1;
[X, Y] = meshgrid( linspace(0,2));
z = fun(X, Y);
contour(X, Y, z);