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 Ternary Diagram - Calculate Area		  New Topic  Reply to Topic
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josecqneto

2 Posts
Posted - 09/28/2023 :  9:28:38 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hello everyone,

I've tried multiple ways of calculating the area, but I always get a value that's strange. I'll explain.
My curve is attatched.https://my.originlab.com/ftp/forum_and_kbase/Images/ternary_diagram_calculate_area.opju

When I use the Analysis>Mathematics>Integrate, I aways get a negative value that makes no sense to the ocupation of the area viewed in the graph. I wanted to get a % value of the area above the curve, but if I get the % value of the area below, that works too, because it's complementary.

I thank you all in advance!

ChaoC

USA
178 Posts
Posted - 09/29/2023 :  09:52:23 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hello josecqneto,

Please see this page: https://www.originlab.com/doc/Quick-Help/Area-Calculation-in-2D-Ternary

Ternary plots don't use Cartesian coordinates so you will have to multiply the value by sqrt(3)/2.

If you want to area above the curve, you can highlight columns X and Z instead.

Best,
Chao
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