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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Anti-Spam Code: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by josecqneto[/i] [br]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.[url]https://my.originlab.com/ftp/forum_and_kbase/Images/ternary_diagram_calculate_area.opju[/url] 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! [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.