# Threshold by Part ID/Convert Field Array to Cell Array
**URL:** https://discourse.paraview.org/t/threshold-by-part-id-convert-field-array-to-cell-array/1486
**Category:** ParaView Support
**Created:** [March 18, 2019, 8:30pm UTC](https://discourse.paraview.org/t/threshold-by-part-id-convert-field-array-to-cell-array/1486 "2019-03-18T20:30:46Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@theodorebaltis](https://discourse.paraview.org/u/theodorebaltis)
#### Post date: [March 18, 2019, 8:30pm UTC](https://discourse.paraview.org/t/threshold-by-part-id-convert-field-array-to-cell-array/1486/1 "2019-03-18T20:30:46Z")
Hello,
I would like to threshold by part ID, however I see that one can only do so by point/cell data scalars.
Is there a way to convert field array data (part IDs) to cell arrays?
Thanks,
Theodore
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### Author:  [@Kenichiro-Yoshimi](https://discourse.paraview.org/u/Kenichiro-Yoshimi)
#### Post date: [March 20, 2019, 12:46am UTC](https://discourse.paraview.org/t/threshold-by-part-id-convert-field-array-to-cell-array/1486/2 "2019-03-20T00:46:43Z")
If your data is a multiblock dataset, the easiest way to do it may be to use the **Block Scalars** filter.
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### Author:  [@theodorebaltis](https://discourse.paraview.org/u/theodorebaltis)
#### Post date: [March 20, 2019, 2:59pm UTC](https://discourse.paraview.org/t/threshold-by-part-id-convert-field-array-to-cell-array/1486/3 "2019-03-20T14:59:30Z")
I see that this filter adds a scalar field, but one that only pertains to block indices. I’m looking for a way to get a scalar field that relates directly to part IDs.
I understand that I could build and append a partID cell data array to each of my lowest level blocks through a programmable filter.
Alternatively, I will probably attach a partID array to my data as it is written. It’s coming out of a custom solver.
Thank you for your suggestion, though.