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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 graphy1999[/i] [br]I met a question, in my nonlinear fitting, the equations were expressed by y=x*(K1*E1*L+K2*E2*L^2)/(1+K1*L+K2*L^2); z=L+x*(K1*L+2*K2*L^2)/(1+K1*L+K2*L^2); L depends on z, so I donot know how to define Variable L. Edited by - graphy1999 on 08/20/2006 04:58:44 AM [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.