Help with converting equation to cell formula?

[frabulator]

I am in need of the following equation to be converted into a formula (Surface Integral). More specifically, this one. It is to calculate the surface area of a rounded area of a mesh. I am going to be writing VBA code to handle this, which I am quite competent in doing, but looking at calculus formulas... not so much. To put it simple, I would like help to decipher the calculation and converting it into an Excel formula for a cell.

I can provide sample data and a mesh, and I do not need the whole thing calculated. I just need to see how one is done and I can complete the rest on my own.

Many thanks,
~Frab

 

[James006]

Hi,
For multiple integrals and mixed derivatives, take a look at ExceLab Calculus Add-in for Excel: Patented spreadsheet calculus functions

 

[frabulator]

Hi,
For multiple integrals and mixed derivatives, take a look at ExceLab Calculus Add-in for Excel: Patented spreadsheet calculus functions

Thank you, but not exactly what I was looking for. I am not in need of a an answer to the equation, I am in need of how to format the equation in Excel.