# How to look at slab data?

**URL:** <https://fenicsproject.discourse.group/t/how-to-look-at-slab-data/12154>\
**Category:** General\
**Created:** [September 9, 2023, 8:41pm UTC](https://fenicsproject.discourse.group/t/how-to-look-at-slab-data/12154 "2023-09-09T20:41:42Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![prusso630](https://avatars.discourse-cdn.com/v4/letter/p/ba9def/32.png) [@prusso630](https://fenicsproject.discourse.group/u/prusso630)\
**Post date:** [January 7, 2024, 6:25pm UTC](https://fenicsproject.discourse.group/t/how-to-look-at-slab-data/12154/5 "2024-01-07T18:25:45Z")

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There is also a related post about the type of function space to use for multiple materials:

> [@How to set up a function space consisting of multiple domains from an imported gmsh mesh for an elasticity analysis](https://fenicsproject.discourse.group/t/how-to-set-up-a-function-space-consisting-of-multiple-domains-from-an-imported-gmsh-mesh-for-an-elasticity-analysis/12112/5):
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> You are assuming a 1 to 1 relationship between the dofs of a DG-1 space and the cell indices. This is not correct, as there is only a 1-1 relationship between a DG-0 space and the cell indices. So i would suggest using a DG-0 space. See also part two of the tutorial: [Defining subdomains for different materials — FEniCSx tutorial](https://jsdokken.com/dolfinx-tutorial/chapter3/subdomains.html#convert-msh-files-to-xdmf-using-meshio) which creates materials based on cell data from the mesh markers.

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