[Paraview] How to smooth a polygonal line ?

[hengxing pan]

Hi, all
As the title says, I'm wondering if there is a filter smoothing a polygonal
line (vtk format), since there is a filter named as ''smooth' which only
can be applied to the surface data type. I think I have to do a curve
fitting in Paraview, but I dont know how to do it exactly. Does anyone have
a idea about that ?  Thank you in advance !
The attached is a ploygonal line.vtk I wrote.
Hengxing
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