[Paraview] Sum two data array in paraview

[Jay Romero]

Hello

I want to use calculator or Python shell to sum two data arrays in paraview.
In the calculator:
At time dt =2, I create an array: result1 = pressure* 2.
For next animation time, dt = 4:
I create an array: result2 = pressure*4
What I find that the result1 array has changed at time step =4.
How I can retain original result1 array when I change the animation time to
dt=4.

This way I want to take sum of result1 and result2 at two different time
steps.

How we can achieve it in paraview?

Best regards
Jay Reno
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