# Pass Data to vtkDescritptiveStatistics and vtkOrderedStatistics
**URL:** https://discourse.paraview.org/t/pass-data-to-vtkdescritptivestatistics-and-vtkorderedstatistics/4472
**Category:** ParaView Support
**Tags:** vtk
**Created:** [June 2, 2020, 7:58am UTC](https://discourse.paraview.org/t/pass-data-to-vtkdescritptivestatistics-and-vtkorderedstatistics/4472 "2020-06-02T07:58:48Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Resa](https://discourse.paraview.org/u/Resa)
#### Post date: [June 2, 2020, 7:58am UTC](https://discourse.paraview.org/t/pass-data-to-vtkdescritptivestatistics-and-vtkorderedstatistics/4472/1 "2020-06-02T07:58:48Z")
Heyy
I need to compute some statistics inside of sphere clips (mean, standard deviation, quantiles). One clip contains approx. 300 points with 5 variables of Interest each point. How do i pass my data to the statistics functions?
To get the single values I could use for example:
`paraview.servermanager.Fetch(clip1).GetPointData().GetArray(0).GetTuple(2)`
wich gives me the value of 1st metadata of the 3rd point.
It would be better though to pass the whole object with all data directly.
The DescriptiveStatistics-function i would start like this:
```
stat = vtk.vtkDescriptiveStatistics
stat.SetInputArrayToProcess(...) (???)
```
Is it right to use SetInputArrayToProcess()? What would be the Input?
How do i continue?
---
### Author:  [@Resa](https://discourse.paraview.org/u/Resa)
#### Post date: [June 3, 2020, 11:01am UTC](https://discourse.paraview.org/t/pass-data-to-vtkdescritptivestatistics-and-vtkorderedstatistics/4472/3 "2020-06-03T11:01:51Z")
Or would I use `stat.SetInputData()` ?
This would require a vtkDataObject as input. How can i transform my PointData/vtkDoubleArray?
---
### Author:  [@dcthomp](https://discourse.paraview.org/u/dcthomp)
#### Post date: [June 3, 2020, 1:48pm UTC](https://discourse.paraview.org/t/pass-data-to-vtkdescritptivestatistics-and-vtkorderedstatistics/4472/4 "2020-06-03T13:48:22Z")
If you are going to use the VTK classes directly instead of via ParaView’s filters, then you should construct a vtkTable (say `table`) and pass it to the filter `stat.SetInputData(table)`. This is easy – just add the point-data arrays from your clip filter as columns to the table. Once you have set the input table, you need to configure the `stat` filter to indicate (1) which columns you want statistics on and (2) which phases you want to run (most probably Learn and Derive in your case) before calling `stat.Update()`.
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### Author:  [@Resa](https://discourse.paraview.org/u/Resa)
#### Post date: [June 3, 2020, 2:50pm UTC](https://discourse.paraview.org/t/pass-data-to-vtkdescritptivestatistics-and-vtkorderedstatistics/4472/5 "2020-06-03T14:50:10Z")
Thank you David!
I tried:
```
ABarray = paraview.servermanager.Fetch(clip1).GetPointData().GetArray(0)
Table = vtk.vtkTable
Table.AddColumn(ABarray)
```
and got the error message:
Type Error: unbound method requires a vtkmodules.vtkCommonDataModel.vtkTable as the first argument
What can I do? the Array is type vtkDoubleArray
Sorry if I ask simple questions, I’m just a beginner 😅
---
### Author:  [@Resa](https://discourse.paraview.org/u/Resa)
#### Post date: [June 3, 2020, 2:54pm UTC](https://discourse.paraview.org/t/pass-data-to-vtkdescritptivestatistics-and-vtkorderedstatistics/4472/6 "2020-06-03T14:54:44Z")
Ahh now it worked 😃
Just forgot the brackets
---
### Author:  [@Resa](https://discourse.paraview.org/u/Resa)
#### Post date: [June 3, 2020, 3:37pm UTC](https://discourse.paraview.org/t/pass-data-to-vtkdescritptivestatistics-and-vtkorderedstatistics/4472/7 "2020-06-03T15:37:58Z")
Thanks David
This is my code so far:
```
clip1 = GetActiveSource()
ABarray = paraview.servermanager.Fetch(clip1).GetPointData().GetArray('activation bipolar (ms)')
ABarray.SetName("activation bipolar (ms)")
AUarray = paraview.servermanager.Fetch(clip1).GetPointData().GetArray('activation unipolar (ms)')
AUarray.SetName("activation unipolar (ms)")
Table = vtk.vtkTable()
Table.AddColumn(ABarray)
Table.AddColumn(AUarray)
stat = vtk.vtkDescriptiveStatistics()
stat.SetInputData(Table)
stat.AddColumn('activation bipolar (ms)')
stat.AddColumn('activation unipolar (ms)')
stat.SetLearnOption(1)
stat.SetDeriveOption(1)
stat.Update()
```
How do i now get the output? (e.g. mean)