Help with output of model.evaluate()

[LeoKonzett]

Hey,

I am using COMSOL to obtain eigenfrequencies for a 2D membrane. To each eigenfrequency, there is a corresponding mode shape (amplitude in z direction). My model meshes fine, and the solution is also fine.

I use MPh to process the data set without exporting it from COMSOL.

After loading the model, I use
(X, Y, mode_shape) = model.evaluate(["x", "y", "w"], unit="um", dataset=data_set)
Here, I use the internal variable w from COMSOL.

The mode_shape variable is a NumPy array of dimensions (4, 257257). Same for the X and Y arrays.

What do the rows and columns in this case represent?

Thanks for your help