All Forums  Origin Forum for Programming  Forum for Origin C  Initialization of parameter in NLFit

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

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 will2008[/i] [br]Origin Ver. and Service Release (Origin 2018): Operating System:Window 10 I would like to use release kinetic models to fit my data. For that purpose, I built the several functions as user-defined in nonlinear curve fitting. But I have to provide a Code to be executed to initialize parameters. Due to my weakness in programming a friend of mine send me the initialization codes (example as shown in attached picture) that he used in excel. I would like to if it is possible to copy that code in origin. The codes are written in Visual Basis. Secondly please can origin has inbuilt functions for kinetic (dissolution) release such as: Zero-order model: y=k*t First order model: y=1-exp(-k*t) Higuchi model: y=k*t^0.5 Hixson-Crowell model: y=1-(1-k*t)^3 Korsmeyer-Peppas model: y=k*t^n Peppas-Sahlin model: y=kd*t^m+kr*t^(2*m) Kopcha model: y=A *t^0.5 + B * t Thanks [img]https://my.originlab.com/ftp/forum_and_kbase/Images/1.function code.JPG[/img] [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.