how can ı plot my plot at certain location ?

I have three variable namely; X/D, Y,D, and u/U , let's say want to plot u/U at x/D=1,2 3,4 and I want to plot so that the graph should be seen at x/d =1,2,3,4 at the same graph as it shown in the picture.

Answer 1

[Ashu]

As per my understanding, you want to plot some points over X/D at 1, 2, 3, 4 on an existing plot.

To do that you can do something similar to this

% Define x/D vector
x_D = [1 2 3 4];

% Define matrix of u/U values
u_U = [1 2 3 4 ; 
       5 6 7 8;
       9 10 11 12;
       13 14 15 16];

% Plot u/U against x/D
hold on;
plot(x_D, u_U, 'x');
hold off;

To know more about 'hold', you can go through the following documentation :

https://www.mathworks.com/help/matlab/ref/hold.html