# Operations on frames - linear combination and envelope

**URL:** https://discourse.paraview.org/t/operations-on-frames-linear-combination-and-envelope/11087
**Category:** ParaView Support
**Created:** [December 30, 2022, 8:30pm UTC](https://discourse.paraview.org/t/operations-on-frames-linear-combination-and-envelope/11087 "2022-12-30T20:30:46Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![FEngineer](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/f/5f8ce5/32.png) [@FEngineer](https://discourse.paraview.org/u/FEngineer)
#### Post date: [December 30, 2022, 8:30pm UTC](https://discourse.paraview.org/t/operations-on-frames-linear-combination-and-envelope/11087/1 "2022-12-30T20:30:46Z")

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Hi,

I’ve found a way to sum results from 2 data sets: [Results superposition](https://discourse.paraview.org/t/results-superposition/10854)

But is it possible to do the same when there’s a single data set containing multiple frames (selected as Time) ?

Also, is there a way to obtain min/max envelope from multiple frames ? What I mean is that the resulting contour plot should contain only minimum or maximum values over all frames for each point. So, for example, if we assume the following simple data:

- point 1:  
frame 1: U = 20  
frame 2: U = 5  
frame 3: U = 35  
frame 4: U = 2

- point 2:  
frame 1: U = 45  
frame 2: U = 30  
frame 3: U = 10  
frame 4: U = 50

and a goal of finding maximum values then the resulting contour plot should show:

- point 1: U = 35
- point 2: U = 50

Possibly with a way to find out which frame contained that min/max value for a given point by creating a contour plot of frame numbers.

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<div class="post-metadata">

### Author: ![FEngineer](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/f/5f8ce5/32.png) [@FEngineer](https://discourse.paraview.org/u/FEngineer)
#### Post date: [January 2, 2023, 11:15am UTC](https://discourse.paraview.org/t/operations-on-frames-linear-combination-and-envelope/11087/2 "2023-01-02T11:15:43Z")

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> [@FEngineer](#):
>
> Also, is there a way to obtain min/max envelope from multiple frames ?

It seems that the Temporal Statistics filter does exactly this. But is it possible to create a contour plot of frame indices as described above ?

And what about summing results from multiple frame (not multiple data sets) ?

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<div class="post-metadata">

### Author: ![FEngineer](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/f/5f8ce5/32.png) [@FEngineer](https://discourse.paraview.org/u/FEngineer)
#### Post date: [March 15, 2023, 11:37am UTC](https://discourse.paraview.org/t/operations-on-frames-linear-combination-and-envelope/11087/3 "2023-03-15T11:37:16Z")

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> [@FEngineer](#):
>
> And what about summing results from multiple frame (not multiple data sets) ?

I think that I’ve found this one too - apparently, the Temporal Array Operator filter can do this.