# About process data in paraview
**URL:** https://discourse.paraview.org/t/about-process-data-in-paraview/6978
**Category:** ParaView Support
**Created:** [April 16, 2021, 12:55pm UTC](https://discourse.paraview.org/t/about-process-data-in-paraview/6978 "2021-04-16T12:55:39Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@lehuong7885](https://discourse.paraview.org/u/lehuong7885)
#### Post date: [April 16, 2021, 12:55pm UTC](https://discourse.paraview.org/t/about-process-data-in-paraview/6978/1 "2021-04-16T12:55:39Z")
Hello guys,
I used ParaView ver 5.9 on the cavity and I got a U magnitude visualization on ParaView, please see the image below.
I need to store this U Magnitude data as a data matrix (2D or 3D), then this data will be used in python code to plot this magnitude again to see the result of the U figure.
How do I store the U data on the Paraview and after that I will use a python script code that can process that matrix data to obtain a U image that magnitude color range same on Paraview result?
I am looking any your help.
Many thanks.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [April 19, 2021, 8:34am UTC](https://discourse.paraview.org/t/about-process-data-in-paraview/6978/2 "2021-04-19T08:34:21Z")
THe magnitude is computed on the fly, you need to actually compute it on the data, use the calculator for that, then save your data.
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### Author:  [@lehuong7885](https://discourse.paraview.org/u/lehuong7885)
#### Post date: [April 21, 2021, 2:41pm UTC](https://discourse.paraview.org/t/about-process-data-in-paraview/6978/3 "2021-04-21T14:41:44Z")
Thank you for your suggestion. I will do it.