# Comparative view for different blocks

**URL:** https://discourse.paraview.org/t/comparative-view-for-different-blocks/11256
**Category:** ParaView Support
**Created:** [January 24, 2023, 10:55am UTC](https://discourse.paraview.org/t/comparative-view-for-different-blocks/11256 "2023-01-24T10:55:43Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Juan\_Jose\_Casafranca](https://discourse.paraview.org/user_avatar/discourse.paraview.org/juan_jose_casafranca/32/3499_2.png) [@Juan\_Jose\_Casafranca](https://discourse.paraview.org/u/Juan_Jose_Casafranca)
#### Post date: [January 24, 2023, 10:55am UTC](https://discourse.paraview.org/t/comparative-view-for-different-blocks/11256/1 "2023-01-24T10:55:43Z")

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I have a source which provides a vtkMultiBlockDataSet. I want to compare two blocks of the dataset. Right now I am using a ExtractBlock filter and using two different render views to show each block on its own view.

I would like to know if there is any approach to use a Comparative View for this task.

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### Author: ![streumix](https://discourse.paraview.org/user_avatar/discourse.paraview.org/streumix/32/8169_2.png) [@streumix](https://discourse.paraview.org/u/streumix)
#### Post date: [December 16, 2024, 7:41am UTC](https://discourse.paraview.org/t/comparative-view-for-different-blocks/11256/2 "2024-12-16T07:41:13Z")

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I’m facing exactly the same problem: Would like to setup a comparative view with each block isolated. And although comparative View Inspector allows to use block name on group datasets to iterate on, I cannot make it work. Do I nned to specifc block names as a string, or just indices? How does it work?