# filter 'Plot over line' gives nan values

**URL:** https://discourse.paraview.org/t/filter-plot-over-line-gives-nan-values/11337
**Category:** ParaView Support
**Created:** [February 6, 2023, 1:18am UTC](https://discourse.paraview.org/t/filter-plot-over-line-gives-nan-values/11337 "2023-02-06T01:18:40Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![Kenneth\_Moreland](https://discourse.paraview.org/user_avatar/discourse.paraview.org/kenneth_moreland/32/15033_2.png) [@Kenneth\_Moreland](https://discourse.paraview.org/u/Kenneth_Moreland)
#### Post date: [March 1, 2023, 6:21pm UTC](https://discourse.paraview.org/t/filter-plot-over-line-gives-nan-values/11337/5 "2023-03-01T18:21:51Z")

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Hmm. This could be a problem with the reader.

This Tecplot reader is one of those in the VisitBridge, which means that the reader comes from the VisIt developer team. I just tried loading your data in the most recent version of VisIt (3.3.2) and got the same behavior. So, if it is an issue with the reader, it would at best take a long time for the fix to make it to ParaView. (See for example [Issue with tecplot binary cell centered data.](https://discourse.paraview.org/t/issue-with-tecplot-binary-cell-centered-data/10428) for a different problem with the same reader.)

That said, I took another look at your data, and it appears that the coordinates are repeated in the `x_D`, `y_D` and `z_D` fields, and the `z_D` field is actually correct. So, you can use the `Calculator` filter to fix the coordinates. Turn on the `Coordinate Results` checkbox and set the expression to `coords + z_D*kHat`.

 ![Screen Shot 2023-03-01 at 11.17.55 AM](https://discourse.paraview.org/uploads/default/original/2X/1/1d2e3018557469ac5982964d5d4a7e60bc2651df.png)

After you fix the coordinates, you may need to change to 3D interaction in the view. Click the `2D` in the small toolbar over the render view to change it to `3D`.

Here is a state file that enacts this fix: [fixed-coordinates.pvsm](https://discourse.paraview.org/uploads/short-url/jjDhNu0Vo69ROxw08MNmtcZVJoS.pvsm) (299.5 KB)

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