# how to set defualt value for vtkProbeFilter?

**URL:** https://discourse.vtk.org/t/how-to-set-defualt-value-for-vtkprobefilter/8116
**Category:** Support
**Created:** [March 23, 2022, 6:03am UTC](https://discourse.vtk.org/t/how-to-set-defualt-value-for-vtkprobefilter/8116 "2022-03-23T06:03:25Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![WailmerPail](https://discourse.vtk.org/user_avatar/discourse.vtk.org/wailmerpail/32/3356_2.png) [@WailmerPail](https://discourse.vtk.org/u/WailmerPail)
#### Post date: [March 23, 2022, 6:03am UTC](https://discourse.vtk.org/t/how-to-set-defualt-value-for-vtkprobefilter/8116/1 "2022-03-23T06:03:25Z")

</div>

Hi, teams

I am confused with ‘setting default value for vtkProbeFilter’, can anyone tell me how to do that?

Besides, there is a class named vtkImageProbeFilter in documents, which version have this class and I found that it has a function named " [SetInterpolator]" ([https://vtk.org/doc/nightly/html/classvtkImageProbeFilter.html#a64df10f086988f991d6cbac9fa281b4c](https://vtk.org/doc/nightly/html/classvtkImageProbeFilter.html#a64df10f086988f991d6cbac9fa281b4c))

Does vtkProbeFilter has a similar function?  
If not, how does vtkProbeFilter do interpolation?

Thank you!

Best regards.