# Compare two set of points with PointData
**URL:** https://discourse.paraview.org/t/compare-two-set-of-points-with-pointdata/5783
**Category:** ParaView Support
**Created:** [November 12, 2020, 7:06pm UTC](https://discourse.paraview.org/t/compare-two-set-of-points-with-pointdata/5783 "2020-11-12T19:06:29Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Juan\_Jose\_Casafranca](https://discourse.paraview.org/u/Juan_Jose_Casafranca)
#### Post date: [November 12, 2020, 7:06pm UTC](https://discourse.paraview.org/t/compare-two-set-of-points-with-pointdata/5783/1 "2020-11-12T19:06:29Z")
I have two set of points with 6 PointData on each of them. Then PointData represents a 3x3 symmetric matrix. I want to compute the difference between the data in both sets to check if they are equal (they are computed in two different but equivalent ways).
I dont know how to create a single set of points with the data of both sets so I can later compute the difference.
Any tip on how to do this will be very helpful
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### Author:  [@Kenneth\_Moreland](https://discourse.paraview.org/u/Kenneth_Moreland)
#### Post date: [November 12, 2020, 7:20pm UTC](https://discourse.paraview.org/t/compare-two-set-of-points-with-pointdata/5783/2 "2020-11-12T19:20:24Z")
Sounds like a job for the `Append Attributes` filter. This filter takes two data sets and combines all of the point and cell data into one data set.
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### Author:  [@Juan\_Jose\_Casafranca](https://discourse.paraview.org/u/Juan_Jose_Casafranca)
#### Post date: [November 12, 2020, 7:23pm UTC](https://discourse.paraview.org/t/compare-two-set-of-points-with-pointdata/5783/3 "2020-11-12T19:23:46Z")
Ah right. I was trying Group Datasets and that was not working. Append Attributes works fine. Thanks!