Hi,
It’s because our files use a single column of data points (the two columns you see correspond to real and imaginary parts of the field at each point).
There’s a way to export data to a matrix format:
1) Open your f3d file using the default program (Optiwave 3D Viewer)
2) Select the desired data type (amplitude, intensity etc) in the data tab on the left so it becomes highlighted
3) Right click on the highlighted data type and select “Data viewer”
4) To export the entire matrix, click in the top-left corner of the matrix
5) Right click and select “copy selection”
You can now paste you data into excel for example.