use matlab code to draw the joint PMF and CDF

Hi, I am here confused about how to use 3D plot to draw the PMF (Probability Mass function) and CDF(Cumulative Distribution Function) based on x y two random variables. (The PMF I can draw it on paper but have no idea how to generate a code). Appreciate for the help

I tried the code below but it did not generate the graph what it supposed to be.

plot3([0 0 0],[0 0 0],[0 0 0.25])
hold on
plot3([1 0 0],[0 0 0],[0 0 0.125])
plot3(1, 0, 2)
hold on
plot3([0 0 0],[0 1 0],[0 0 0.5])
hold on
xlabel('X')
ylabel('Y')
zlabel('Probability')
grid on

Answer 1

[Chunru]

[x, y] = meshgrid([0 1], [0 1])

x = 2×2

0 1 0 1

y = 2×2

0 0 1 1

z = [0.25  0.5; 0.125 0.125]';
stem3(x, y, z)
xlabel('x');
ylabel('y');
zlabel('p')