# Visualize the difference between two mesh points
**URL:** https://discourse.paraview.org/t/visualize-the-difference-between-two-mesh-points/6748
**Category:** ParaView Support
**Created:** [March 20, 2021, 10:08am UTC](https://discourse.paraview.org/t/visualize-the-difference-between-two-mesh-points/6748 "2021-03-20T10:08:00Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@chathu](https://discourse.paraview.org/u/chathu)
#### Post date: [March 20, 2021, 10:08am UTC](https://discourse.paraview.org/t/visualize-the-difference-between-two-mesh-points/6748/1 "2021-03-20T10:08:01Z")
I have two volumetric liver meshes in .vtk format (i.e. ground-truth and predicted versions) and now I want to plot the error i.e., for example, the difference between the ground-truth and the predicted liver meshes on the predicted mesh / mesh coordinates with a different colour (colour code based on displacement magnitudes) to visualize how much deviation that each point has ? Is it possible in Paraview ? If so can you elaborate the steps with an example please ?
I have herewith attached two samples .vtk files for your further reference.
[sample\_data.zip](https://discourse.paraview.org/uploads/short-url/gFs3ZoiEpOVNuVDnUouTGSCt5Us.zip) (80.7 KB)
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### Author:  [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)
#### Post date: [March 20, 2021, 11:59am UTC](https://discourse.paraview.org/t/visualize-the-difference-between-two-mesh-points/6748/2 "2021-03-20T11:59:11Z")
Attached is a state file. You can use a **Python calculator** to compute the difference.
[difference.pvsm](https://discourse.paraview.org/uploads/short-url/iOrRDuITKRtT7CTcCYNYwqAlC8b.pvsm) (374.4 KB)