# How to plot the pressure distribution on the boundary
**URL:** https://community.freefem.org/t/how-to-plot-the-pressure-distribution-on-the-boundary/2594
**Category:** General Discussion
**Created:** [July 11, 2023, 7:00am UTC](https://community.freefem.org/t/how-to-plot-the-pressure-distribution-on-the-boundary/2594 "2023-07-11T07:00:13Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@jawahar264](https://community.freefem.org/u/jawahar264)
#### Post date: [July 11, 2023, 7:00am UTC](https://community.freefem.org/t/how-to-plot-the-pressure-distribution-on-the-boundary/2594/1 "2023-07-11T07:00:13Z")
For example for an airfoil after computing the pressure distribution in the domain i want only the data on the airfoil how can i plot it?
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### Author:  [@cmd](https://community.freefem.org/u/cmd)
#### Post date: [July 11, 2023, 7:11am UTC](https://community.freefem.org/t/how-to-plot-the-pressure-distribution-on-the-boundary/2594/2 "2023-07-11T07:11:08Z")
You should use an external tool like Paraview to do this. See:
[https://doc.freefem.org/documentation/visualization.html](https://doc.freefem.org/documentation/visualization.html)
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### Author:  [@jawahar264](https://community.freefem.org/u/jawahar264)
#### Post date: [July 11, 2023, 7:19am UTC](https://community.freefem.org/t/how-to-plot-the-pressure-distribution-on-the-boundary/2594/3 "2023-07-11T07:19:11Z")
thanks for helping well in Paraview we can plot the data on a line but i want to plot over an airfoil and its not a straight line. how to do it
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### Author:  [@cmd](https://community.freefem.org/u/cmd)
#### Post date: [July 11, 2023, 7:21am UTC](https://community.freefem.org/t/how-to-plot-the-pressure-distribution-on-the-boundary/2594/4 "2023-07-11T07:21:07Z")
Check here?
[https://www.paraview.org/ParaView/index.php/Plotting\_Over\_Curves](https://www.paraview.org/ParaView/index.php/Plotting_Over_Curves)
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### Author:  [@marchywka](https://community.freefem.org/u/marchywka)
#### Post date: [July 11, 2023, 10:48am UTC](https://community.freefem.org/t/how-to-plot-the-pressure-distribution-on-the-boundary/2594/5 "2023-07-11T10:48:55Z")
I tried this but paraview just plotted a small scale in lower left and claimed
z was identially zero. Did I need to build with some support enabled? The
file looks like XML with binary encoded data so I can’t tell b looking at it if itis
right. Do I need to pick some menu thing in paraview to get the result
shown on the webpage? Thanks.
Thanks.
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### Author:  [@cmd](https://community.freefem.org/u/cmd)
#### Post date: [July 11, 2023, 2:36pm UTC](https://community.freefem.org/t/how-to-plot-the-pressure-distribution-on-the-boundary/2594/6 "2023-07-11T14:36:05Z")
I’m sorry, but I am by no means a “power user” of Paraview. I suggest you look for an answer on the [Paraview forums](https://discourse.paraview.org/).
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### Author:  [@marchywka](https://community.freefem.org/u/marchywka)
#### Post date: [July 11, 2023, 3:33pm UTC](https://community.freefem.org/t/how-to-plot-the-pressure-distribution-on-the-boundary/2594/7 "2023-07-11T15:33:27Z")
I had to put the paraview file into a zip but can anyone open this
and see if it works? I got nothing but 2 axes in lower left. Thanks.
[u.zip](https://community.freefem.org/uploads/short-url/LceNROKSSRDzFU0dlmUi2Dn9bc.zip) (2.9 KB)
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### Author:  [@Afrahs](https://community.freefem.org/u/Afrahs)
#### Post date: [February 18, 2025, 7:59am UTC](https://community.freefem.org/t/how-to-plot-the-pressure-distribution-on-the-boundary/2594/8 "2025-02-18T07:59:44Z")
How can you plot the data on a Line ?