# plot over line vtp files
**URL:** https://discourse.paraview.org/t/plot-over-line-vtp-files/17679
**Category:** ParaView Support
**Tags:** vtk
**Created:** [August 8, 2026, 1:56pm UTC](https://discourse.paraview.org/t/plot-over-line-vtp-files/17679 "2026-08-08T13:56:41Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Mersad\_j](https://discourse.paraview.org/u/Mersad_j)
#### Post date: [August 8, 2026, 1:56pm UTC](https://discourse.paraview.org/t/plot-over-line-vtp-files/17679/1 "2026-08-08T13:56:41Z")
[validator.vtp](https://discourse.paraview.org/uploads/short-url/dPHlHDi9jGNaD6UwGdnONl0gF8K.vtp) (2.6 MB)
hi i have a file in vtp format. im new to paraview and i have some problems. i share here. when i use plot over line or any types of plot filters i dont know how to set my x and y axis data. for example i want to plot True\_u data over center line of my domain. when i set plot over line filter the plot window shows nothing. please help me
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### Author:  [@Lucas\_Givord](https://discourse.paraview.org/u/Lucas_Givord)
#### Post date: [August 10, 2026, 7:57am UTC](https://discourse.paraview.org/t/plot-over-line-vtp-files/17679/2 "2026-08-10T07:57:10Z")
Hello @Mersad_j ,
First, when I try it on my side, nothing is displayed when I do a plot over line (probably because your vtp contains only vertices), I need first to compute a `Delaunay2D`.
To changes the array used in the X axis, you should go to the properties panel and found the **X Array Name** field under the **Display** category, here is what I have:
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### Author:  [@Mersad\_j](https://discourse.paraview.org/u/Mersad_j)
#### Post date: [August 13, 2026, 7:27pm UTC](https://discourse.paraview.org/t/plot-over-line-vtp-files/17679/3 "2026-08-13T19:27:44Z")
**Hey,**
Thanks a lot for helping me out with that major issue.❤
I’m wondering where I can find more information on how to work with these kinds of files.
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### Author:  [@Lucas\_Givord](https://discourse.paraview.org/u/Lucas_Givord)
#### Post date: [August 14, 2026, 7:25am UTC](https://discourse.paraview.org/t/plot-over-line-vtp-files/17679/4 "2026-08-14T07:25:27Z")
vtp files are commons but having only a point cloud (assuming all of your data is like the file that you shared) may not works with all filters, doing a **Delaunay2D** may be necessary in these cases.
In anycase, I recommend you to check this page : [https://www.paraview.org/tutorials/](https://www.paraview.org/tutorials/), you’ll find different resources such as tutorials, webinar, etc…