[Paraview] working with dates of 2 spreadsheets in calculator

[Shima Sadat Mostafavi]

Dear users,
Technically I have 30 different spreadsheets with coordinates of some
points (points illustrated for 30 time steps). I want to subtract values of
column 1 of both spreadsheets via calculator and show them in a result
column. Can anyone show me how to do it?
I'm very thankful for any help or suggestion.

Regards,
Shima
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