Hydrostatic Pressure - Non-uniform Distribution

Hi,

I'm trying to simulate the hydrostatic pressure in a pressure vessel. It seems there is more than one way to 'skin a cat' with this type of study.

I found an interesting study which I want to recreate to compare against my own study, yet I'm having problems deciphering their equation. I'm not sure how to put their data into the edit equation dialogue box in non-uniform distribution. Any help...

I will paste their study information here:

https://pveng.com/wp-content/uploads/2016/06/PVEfea-4225-0-1.pdf

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