How to create a statistical RMS graph

GiD Postprocess
1

Hi everyone
I need the root mean square of a pressure on a line graph, so I need to create a statistical graph.

  1. there’s no automatic way to compute that right? (for average, std, maximum we only need to go to Window->create statistical graph)
  2. I thought to proceed in this way:
    a)create result → Result1: pressure Operator: * Result2: pressure New name=pressure^2 select all step box
    b)create statistical graph → all step statistical operation: average of: pressure^2

That should create the RMS…
My doubt is on create result, because Gid forces you to choose a time step for result1 and for result2 even if you select “all step box”.
The question is: Is it only a bug ? Everything works fine in any case?

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2

Hello,

Yes, you are right, this is the way to create the RMS.

Regarding the “Create result” window, yes, it’s a bug, thank you for letting us know.
In any case, is working properly, just select the first step for both results and mark the “all steps” box.

3

just for someone that can read this post…the procedure above returns the TOTAL SQUARE SUM (the power2 of the RMS) :smiley:

4

In next GiD 14.1.1d developer version we will add this ‘Root mean square’ to the list of default operators of the ‘Create statistical scalar result’ window.