make a flat surface plot in matlab

To create a flat surface plot in MATLAB, you can use the surf function. Here's an example code:

main.m
% Define the x and y coordinates of the grid
x = linspace(-1, 1, 100);
y = linspace(-1, 1, 100);
[X, Y] = meshgrid(x, y);

% Define the function to be plotted
Z = 2*X.^2 + Y.^2 - X.*Y;

% Create the surface plot
surf(X, Y, Z)
view(2)
colorbar
243 chars
13 lines

In this example code, we define the x and y coordinates of a grid using the linspace function, and then use the meshgrid function to create the corresponding matrices X and Y. We also define a function Z that we want to plot on this grid. Finally, we use the surf function to create the surface plot, and the view function to set the view to a 2D plane. The colorbar function adds a colorbar to the plot to show the scale of the function values.