# Extract selection combined with integrate variables filter results in 0

**URL:** https://discourse.paraview.org/t/extract-selection-combined-with-integrate-variables-filter-results-in-0/9671
**Category:** ParaView Support
**Created:** [May 24, 2022, 6:41pm UTC](https://discourse.paraview.org/t/extract-selection-combined-with-integrate-variables-filter-results-in-0/9671 "2022-05-24T18:41:34Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Dave1](https://discourse.paraview.org/user_avatar/discourse.paraview.org/dave1/32/11492_2.png) [@Dave1](https://discourse.paraview.org/u/Dave1)
#### Post date: [May 24, 2022, 6:41pm UTC](https://discourse.paraview.org/t/extract-selection-combined-with-integrate-variables-filter-results-in-0/9671/1 "2022-05-24T18:41:34Z")

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I have a slice which i use extract selection to get the desired output. When i use the integrate filter on it all variables will get the value 0 and i dont how to fix that. The interesting thing is, when i use a python calculator to get the area of the values i get that: Area = -1 , Cell Type = Vertex

 ![extract selection](https://discourse.paraview.org/uploads/default/original/2X/7/77f34c4c4a798a37f5505c8eb1efd4a078988914.jpeg)

When i use the integrate variables filter directly on the slice it works. As you can see when i use also a python calculator to get the Area. Area has values, and Cell Type = Triangle

 ![slice](https://discourse.paraview.org/uploads/default/original/2X/d/d022eaba7dde2d0fc018093cd28127a32fb6c7e9.jpeg)

I guess it has something to do with that area = -1 and the Cell Type. Any ideas if this beaviour is intendet and how to get the integrated values out of an extraction? Thank you very much.

regards David

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### Author: ![Kenichiro-Yoshimi](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/k/ecc23a/32.png) [@Kenichiro-Yoshimi](https://discourse.paraview.org/u/Kenichiro-Yoshimi)
#### Post date: [May 26, 2022, 11:56pm UTC](https://discourse.paraview.org/t/extract-selection-combined-with-integrate-variables-filter-results-in-0/9671/2 "2022-05-26T23:56:33Z")

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When **ExtractSelection1** is displayed in `Spread Sheet View`, does the `Cell Type` include 2D elements in addition to **Vertex**?

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### Author: ![Dave1](https://discourse.paraview.org/user_avatar/discourse.paraview.org/dave1/32/11492_2.png) [@Dave1](https://discourse.paraview.org/u/Dave1)
#### Post date: [May 29, 2022, 7:27am UTC](https://discourse.paraview.org/t/extract-selection-combined-with-integrate-variables-filter-results-in-0/9671/3 "2022-05-29T07:27:36Z")

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Hi  
ExtractSelection only includes Vertex.  
Slice only includes Triangle.

The slide is a multiblock dataset and works with an integrate filter  
The extract selection is also a mutliblock dateset but the integrate filter doesnt work (all arrays = 0)

 ![paraview0](https://discourse.paraview.org/uploads/default/original/2X/6/62b7748a484ffb28753979f604c277ddc5031448.jpeg)

How to integrate values from a extraction then? Anyone knows?