write a script to generate a triangular mesh on a rectangular domain in matlab

Here is an example script that generates a triangular mesh on a rectangular domain in Matlab using the Delaunay triangulation function:

main.m
% Define the domain:
xmin = 0;
xmax = 1;
ymin = 0;
ymax = 1;

% Define the number of points:
npts = 25;

% Generate the grid of points:
x = linspace(xmin, xmax, sqrt(npts));
y = linspace(ymin, ymax, sqrt(npts));
[X, Y] = meshgrid(x, y);

% Reshape the points into a list:
pts = [X(:) Y(:)];

% Perform the Delaunay triangulation:
tri = delaunay(pts);

% Plot the mesh:
trimesh(tri, pts(:,1), pts(:,2))
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In this script, we first define the rectangular domain by specifying the minimum and maximum x and y coordinates. We then choose the number of points to generate, and use linspace to generate a grid of points within the domain. We reshape the grid of points into a list using X(:) and Y(:), and perform the Delaunay triangulation using the delaunay function. Finally, we plot the resulting mesh using trimesh.