# Assigning a particular vector array result to VTKStreamTracer

**URL:** https://discourse.vtk.org/t/assigning-a-particular-vector-array-result-to-vtkstreamtracer/5110
**Category:** Support
**Created:** [February 1, 2021, 10:46am UTC](https://discourse.vtk.org/t/assigning-a-particular-vector-array-result-to-vtkstreamtracer/5110 "2021-02-01T10:46:11Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![Swarna\_Ravali](https://discourse.vtk.org/user_avatar/discourse.vtk.org/swarna_ravali/32/2573_2.png) [@Swarna\_Ravali](https://discourse.vtk.org/u/Swarna_Ravali)
#### Post date: [February 1, 2021, 10:46am UTC](https://discourse.vtk.org/t/assigning-a-particular-vector-array-result-to-vtkstreamtracer/5110/1 "2021-02-01T10:46:11Z")

</div>

Hi,  
Mainly VTKStreamTracer takes InputData and SourceConnection to plot the flowlines. In my scenario, I have vtkUnstructuredgrid with various vector array results. My query is that, how can we assign a particular vector result as InputData.  
Thanks In Advance.