# Integrate Variable filter does not produce my expected result!

**URL:** https://discourse.paraview.org/t/integrate-variable-filter-does-not-produce-my-expected-result/5088
**Category:** ParaView Support
**Created:** [August 12, 2020, 1:40am UTC](https://discourse.paraview.org/t/integrate-variable-filter-does-not-produce-my-expected-result/5088 "2020-08-12T01:40:00Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![mohammad\_faghih](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mohammad_faghih/32/6098_2.png) [@mohammad\_faghih](https://discourse.paraview.org/u/mohammad_faghih)
#### Post date: [August 12, 2020, 1:40am UTC](https://discourse.paraview.org/t/integrate-variable-filter-does-not-produce-my-expected-result/5088/1 "2020-08-12T01:40:00Z")

</div>

Say I am using ParaView to visualize/post-process results of a 3D simulation where the case name is foo.foam with imported cell arrays: V (volume of cell), and X (some arbitrary scalar variable).  
So, I apply the Integrate Variable filter to the foo.foam; then I go to the spreadsheet and set attribute to Cell type. Among all the data in the single-row sheet, I see a column called Volume which shows the total volume of my domain. So far, so good. The Integrate Variable filter is producing the expected result.  
Next, I apply a Calculator filter to the foo.foam with attribute set to Cell and name set to Sample and enter the expression (V \* X) into the Calculator. Now, if I go to the spreadsheet, I see a column for all the cells in my domain with the title Sample and the corresponding value (result of V \* X) for each cell. So far, so good.  
Now, I need to sum (integrate) this value (V \* X) for the entire domain. I apply the Integrate Variable filter on the Sample, assuming I will get a column in the single-row spreadsheet that gives me the sum of V\*X for the entire domain. However, no new column is being created.  
How do I get value of the “sum” I need?