# Can we create Unstructured grid with time series? How?

**URL:** https://discourse.vtk.org/t/can-we-create-unstructured-grid-with-time-series-how/5114
**Category:** Support
**Tags:** file-formats
**Created:** [February 1, 2021, 2:12pm UTC](https://discourse.vtk.org/t/can-we-create-unstructured-grid-with-time-series-how/5114 "2021-02-01T14:12:41Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![henry](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/h/df705f/32.png) [@henry](https://discourse.vtk.org/u/henry)
#### Post date: [February 1, 2021, 2:12pm UTC](https://discourse.vtk.org/t/can-we-create-unstructured-grid-with-time-series-how/5114/1 "2021-02-01T14:12:41Z")

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I just started to use VTK, and I know that we can create vtk objects with times series by creating a series of files with specific naming rule (e.g. f0.vtu, f1.vtu, … f\*.vtu …). Can we create one vtk object with time series? for example, I have a geometry that has properties attached to points, and the properties are changing with time, now I want to create one VTK object with time-changing properties. Can we do that?

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### Author: ![Paulo\_Carvalho](https://discourse.vtk.org/user_avatar/discourse.vtk.org/paulo_carvalho/32/370_2.png) [@Paulo\_Carvalho](https://discourse.vtk.org/u/Paulo_Carvalho)
#### Post date: [February 21, 2021, 1:32pm UTC](https://discourse.vtk.org/t/can-we-create-unstructured-grid-with-time-series-how/5114/2 "2021-02-21T13:32:52Z")

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Hi, Henry,

One way to do it is to assign multiple scalars to each vertex or cell in your geometry. Take a look at this: [https://github.com/Kitware/VTK/blob/master/Examples/DataManipulation/Python/Arrays.py](https://github.com/Kitware/VTK/blob/master/Examples/DataManipulation/Python/Arrays.py) . It’s in Python, but translating that to another langage shouldn’t be a problem as the APIs are much the same.

cheers,

Paulo