matlab 3d function conture

𝑧 = −𝑥𝑦𝑒−2(𝑥 2+𝑦 2 )

-2≤x≤2 dan -2≤y≤2!

z=-xy*exp(-^2)*(x.^2+y.^2)

↑

Invalid use of operator.

[Rik]

Are you sure you don't mean x*y?

And what exact is the square of the minus symbol?

Answer 1

[Nitya Patel]

It is my understanding that you want to plot the function for the domain .

Below is the code to plot a 3D surface plot of the function:

% Define the space of x and y. linspace will generate 100 equidistant points from -2 to 2.
x = linspace(-2, 2, 100);
y = linspace(-2, 2, 100);

% Creating a meshgrid. Resulting [X, Y] will give a list of 100x100 points.
[X, Y] = meshgrid(x,y);

% Calculating Z. Note that .* and .^ are used to carry out element-wise operations.
Z = -X .* Y .* exp(-2) .* (X.^2+Y.^2);

% Plotting the function
figure;
surf(X,Y,Z);
xlabel('X');
ylabel('Y');
zlabel('Z');

Moreover, if you want to plot a contour plot, replace the surf function with contour. You can also specify levels of contour as the 4th argument.

figure;
contour(X,Y,Z, 50);
xlabel('X');
ylabel('Y');
colorbar;

Documentation of all the functions can be found here:

1. surf
2. contour
3. meshgrid
4. linspace