Text file of "Variable( x , y , Parameter )" instead of "Variable( x , y , z )" when using a 2d model?

Hello,

I want to plot the results of the despersion of the relative Permeability, with respect to two space coordinates x and y (2D Model) and my parametric sweep variable, named "stage".

Actually, I want to save the results, in a .txt file to use them again in a parametric sweep calculation. So the columns should look like:

x y stage rmm.murZZ
0 0 0 1
1 0 0 2
0 0 1 1
1 0 1

Any tips?