# Generation of Annotation from Calculator data
**URL:** https://discourse.paraview.org/t/generation-of-annotation-from-calculator-data/15841
**Category:** ParaView Support
**Created:** [December 6, 2024, 12:16am UTC](https://discourse.paraview.org/t/generation-of-annotation-from-calculator-data/15841 "2024-12-06T00:16:24Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@katterfe](https://discourse.paraview.org/u/katterfe)
#### Post date: [December 6, 2024, 12:16am UTC](https://discourse.paraview.org/t/generation-of-annotation-from-calculator-data/15841/1 "2024-12-06T00:16:24Z")
I have a question regarding the access of calculator data from an programmable annotation in Paraview, The calculator has generated a new array X. Information say its Multiblock Datasets (Table). How can I access this array X in an programmable annotation? I want to plot this (timedependent) value.
In the programmable annotation I tried something like
input1 = self.GetInputDataObject(0, 0)
arrayX = input1.GetData(“X”)
But i did not work. Unfortunately I do not really understand how to access the data structure of the calculators results.
Thanks for your help!
Andre
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [December 6, 2024, 9:05am UTC](https://discourse.paraview.org/t/generation-of-annotation-from-calculator-data/15841/2 "2024-12-06T09:05:33Z")
A python annotation would make this trivial, does it work for you ?
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### Author:  [@katterfe](https://discourse.paraview.org/u/katterfe)
#### Post date: [December 6, 2024, 10:34am UTC](https://discourse.paraview.org/t/generation-of-annotation-from-calculator-data/15841/3 "2024-12-06T10:34:09Z")
Thanks for your reply! I tried this already. As the Python expression I put X (the name of the array) in. But instead of a single value I get the whole VTKArray() with all data from the calculator. I do not understand how to address a specific column of the data in the calculator.
Thanks for your help!
Andre
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [December 6, 2024, 1:38pm UTC](https://discourse.paraview.org/t/generation-of-annotation-from-calculator-data/15841/4 "2024-12-06T13:38:28Z")
I think this is what you are looking for:
```auto
val = inputs[0].RowData["X"].GetArrays()[0][0]
```
`inputs[0]` is the multiblock input
`inputs[0].RowData["X"]` is the whole X array on as a composite array
`GetArrays()[0][0]` recover the first tuple of the first block
hth
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### Author:  [@katterfe](https://discourse.paraview.org/u/katterfe)
#### Post date: [December 6, 2024, 2:40pm UTC](https://discourse.paraview.org/t/generation-of-annotation-from-calculator-data/15841/5 "2024-12-06T14:40:10Z")
Sorry, does not work.
Error: Failed to evaluate expression ‘val = inputs[0].RowData[“X”].GetArrays()[0][0]’. The following exception stack should provide additional developer specific information. This typically implies a malformed expression. Verify that the expression is valid.
Variables in current scope are [‘input’, ‘N’, ‘minvtkOriginalPointIds’, ‘q1vtkOriginalPointIds’, ‘medvtkOriginalPointIds’, ‘q3vtkOriginalPointIds’, ‘maxvtkOriginalPointIds’, ‘avgvtkOriginalPointIds’, ‘stdvtkOriginalPointIds’, ‘sumvtkOriginalPointIds’, ‘minX’, ‘q1X’, ‘medX’, ‘q3X’, ‘maxX’, ‘avgX’, ‘stdX’, ‘sumX’, ‘minY’, ‘q1Y’, ‘medY’, ‘q3Y’, ‘maxY’, ‘avgY’, ‘stdY’, ‘sumY’, ‘minZ’, ‘q1Z’, ‘medZ’, ‘q3Z’, ‘maxZ’, ‘avgZ’, ‘stdZ’, ‘sumZ’, ‘vtkValidPointMask’, ‘Time’, ‘X’]
The array is there but…
THX!!!
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [December 6, 2024, 2:41pm UTC](https://discourse.paraview.org/t/generation-of-annotation-from-calculator-data/15841/6 "2024-12-06T14:41:32Z")
Please share your data.