Plot cross section at particular value of x for mesh(x,y,z).

I have a mesh plot mesh(x,y,z) where x,y and z are having 100 by 100 values. Now I want a cross section plot at a particular value of x. How to do this?

Answer 1

[Star Strider]

You can easily adapt this to your data. I chose different lengths of the ‘x’ and ‘y’ vectors to demonstrate and trace the indexing of the matrices:

x = linspace(5, 10, 80);                                % Create Data
y = linspace(1,  5, 50);                                % Create Data
[X,Y] = meshgrid(x,y);                                  % Create Data
Z = sin(X.^2) - cos(Y.^2);                              % Create Data

figure(1)
surf(X, Y, Z)                                           % Surface Plot
grid on

X_idx = find(x >= 7.5, 1, 'first');                     % Find Desired ‘X’ Value

figure(2)
plot(Y(:,X_idx), Z(:,X_idx))                            % Plot At Desired ‘X’ Value
grid

[Denise Janer]

Hi may I ask why you defined Z using that formula?

What if I have a mesh (x, y, z) where z is depth data? How can I make a cross section at any other points in the x and y axis?

Thanks.

[Alka Panda]

It was just an example, you can adapt Z to a function of your choice