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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 jonatansilva[/i] [br]Origin Ver. and Service Release (Select Help-->About Origin):Origin8 SR2 Operating System: Windows XP Originally posted by giovanetti I have the same problem to make a new function for fitting, this is the source code in C #include <origin.h> #include <stdio.h> #include <data.h> #include <math.h> #include <utilities.h> #include <OC_NAG.h> void _nlsfNewFunction( // Fit Parameter(s): , // Independent Variable(s): double x, // Dependent Variable(s): double& y) { // Beginning of editable part void _nlsfbeac( // Fit Parameter(s): double G1, double B1, double R1, double P1, double G2, double B2, double R2, double P2, double Rg, double Bg, double k1, double b, // Independent Variable(s): double q, // Dependent Variable(s): double& I) { // Beginning of editable part I = G1*exp(-(1/5) * (R1*q)^2) + B1 * exp(-(1/5) * (Rg*q)^2) * (nag_erf(q*R1/6^(1/2))^3/q)^P1 + (G2 * exp(-(1/5) * (R2*q)^2) + B2 * (nag_erf(q*R2/6^(1/2))^3/q)^P2)*(1 - 8*k1*3*(sin(2*q*b)-2*q*b*cos(2*q*b))/(2*q*b)^3) + Bg; // End of editable part } // End of editable part } and return Linking... Done! compiling... _nlfNewFunction.fit C:\Program Files\OriginLab\Origin8\OriginC\system\OC_NAG.h(20) :Error, include file not found C:\Documents and Settings\jonatan\My Documents\OriginLab\Origin8\User Files\OriginC\NLSF\_nlfNewFunction.fit(6) :Error, include file compilation error Compile Failed! How can I fix this? Jonatan Silva fone: +55 11 3091-6814 Instituto de Física FAP - USP Rua do Matão Travessa R, no 187 Basilio Jafet, sala 124B CEP: 05508-000, Cidade Universitária-São Paulo-Brasil. [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.