Hi friends,
I am newbie to Smath studio and I am trying to find area for irregular polygon. I have input the coordinates in a matrix and created a small function to find the area using coordinate geometry. But i am getting an error as the function is not evaluated. if I run the function for a square it works fine. Can somebody help me what is wrong with my function? I have attached the file for reference.

Thanks
Vivek

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Page1.sm (5 KiB) downloaded 35 time(s).

Hello Vivsets,

I think your formula is trying to reference one more row than you need to (outside your matrix). Try rows(X)-1 in your for loop.


Gerry Bush

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Page1-1.sm (5 KiB) downloaded 40 time(s).

If you are interested, in the Extensions Manager (Tools > Plugins > Examples [Local Storage > Online Gallery]) there is a worksheet dedicated to to polygons' properties - just to not reinvent the wheel

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Thanks Gerry and Davide for your replies.

Gerry I fixed the function based on your answer and it works fine.

Davide your example sheet is awesome. You are right there is no point in reinventing the wheel. I will go through it in detail and put it in use in my future development of sheets.