Generate (X,Y) grid coordinates from contourf function

Hello everyone,

I need to generate a grid from contourf function (I need the coordinates of the grid lines and the center of each cell, later I will perform the integral on this grid).

Does anyone know how can I obtain these values? Any help is appreciated.

 X_s = readmatrix('Xs.xlsx');
 Y_s = readmatrix('Ys.xlsx');
 Z_s = readmatrix('Zs.xlsx');
 
 R_s=sqrt(X_s.^2+Y_s.^2+Z_s.^2);
 Phi_s=atan2(Y_s,X_s);
 
 figure()
contourf(X_s,Y_s,R_s,20,'r','Linewidth',2)
axis equal
 xlabel('X_s')
 ylabel('Y_s')
 colorbar 

hold on
contour(X_s,Y_s,rad2deg(Phi_s),20,'k','Linewidth',1)

[VBBV]

Use meshgrid function to generate grid for the defined range and use them as contourf arguments

[VBBV]

In your program the X, Y grid is taken from excel files. Look at the range of values in those files and define them using meshgrid

[Michael Elman]

How can i define a range from my matrices and keeping a shape of the object in the same time? In this problem the spacing is not uniform.

Answer 1

[Shadaab Siddiqie]

From my understanding you want to generate a grid from contourf function, you can refere meshgrid and contourf.