# Quiver (Matlab) in ParaView

**URL:** https://discourse.paraview.org/t/quiver-matlab-in-paraview/2238
**Category:** ParaView Support
**Created:** [July 17, 2019, 11:06am UTC](https://discourse.paraview.org/t/quiver-matlab-in-paraview/2238 "2019-07-17T11:06:20Z")
**Posts on this page:** 1
**Showing post:** 14

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### Author: ![Misha](https://discourse.paraview.org/user_avatar/discourse.paraview.org/misha/32/1732_2.png) [@Misha](https://discourse.paraview.org/u/Misha)
#### Post date: [July 22, 2019, 8:23am UTC](https://discourse.paraview.org/t/quiver-matlab-in-paraview/2238/14 "2019-07-22T08:23:01Z")

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Hi,

I checked it but I still don’t have the answer. I tried to add the attribute : “positive:up”  
to the netCDF file but that didn’t change anything. Do I need to use a different netCDF reader? There is only one that is working  
Is this by any chance related to the following issue:

> [@CGNS support - velocity as a vector](https://discourse.paraview.org/t/cgns-support-velocity-as-a-vector/1364):
>
> I have started generating CGNS files from my CFD code, which is 2D and has a structured mesh. I have found that Paraview does not automatically convert VelocityX and VelocityY into a native vector format that can be plotted with glyph arrows. To get this functionality, I have to use the calculator to form the vectors from the components. Or, I can use the cgns-to-vtk converter to create a vtk file that Paraview recognizes velocity as native vectors. Shouldn’t this functionality be built-in t…

Another thing : the colors of the U component should be the same after I write in the calculator : “U\*iHat”, don’t they? but they seem like the inverse colors.

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