All Forums  Origin Forum  Origin Forum  fitting parameters problem

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 yeonatan[/i] [br]hello, I have a measuer of electronic car. of a transistor device. the formula is I(Vgs,Vds).I have excel file will I,Vgs,Vds measured data,and I have an equetion with fitting parameter.this is my code and i need to run it and i have no plot.what do i o wrong? I want to get the best evaluation to the fitting paraeters compare to my measurement. thanks GENERAL INFORMATION] Function Name=DC_fitting Brief Description= Function Source=N/A Function Type=User-Defined Function Form=Equations Number Of Parameters=7 Number Of Independent Variables=2 Number Of Dependent Variables=1 Analytical Derivatives for User-Defined=Off [FITTING PARAMETERS] Naming Method=User-Defined Names=iw,Vg0,Vg1,alpha,beta,gamma,delta Meanings=? Initial Values=0.36e-3(V),0.5(V),3.996(V),2.351(V),4.360(V),3.268(V),0.43e-3(V) Lower Bounds=--(X,OFF) Upper Bounds=--(X,OFF) Number Of Significant Digits= [FORMULA] y=iw*exp(1+alpha*atan(beta*(Vgs+Vg0)))*(delta*Vds*(Vg1+1+alpha*atan(beta*(Vgs+Vg0)))+tanh(gamma*Vds)); [CONSTRAINTS] /*Enter general linear constraints here*/ [CONSTANTS] [Parameters Initialization] /*Code to be executed to initialize parameters.*/ [INITIALIZATIONS] /*Code to be executed before fitting, a good place for complicated initialization.*/ [AFTER FITTING] /*Code to be executed after fitting, a good place for generating results.*/ [ON PARAM CHANGE] /*Code to be executed when parameters change.*/ [INDEPENDENT VARIABLES] Vds=A(x1) Vgs=B(x2) [DEPENDENT VARIABLES] y= [CONTROLS] General Linear Constraints=Off Initialization Scripts=Off Scripts After Fitting=Off Number Of Duplicates=N/A Duplicate Offset=N/A Duplicate Unit=N/A Generate Curves After Fitting=Yes Curve Point Spacing=Uniform on X-Axis Scale Generate Peaks After Fitting=Yes Generate Peaks During Fitting=Yes Generate Peaks with Baseline=Yes Paste Parameters to Plot After Fitting=Yes Paste Parameters to Notes Window After Fitting=Yes Generate Residuals After Fitting=No Keep Parameters=No Enable Parameters Initialization=0 Compile On Param Change Script=1 [COMPILE FUNCTION] Compile=1 Compile Parameters Initialization=1 On Param Change Scripts Enabled=0 [ORIGIN C FUNCTION HEADER] #pragma warning(error : 15618) #include <stdio.h> #include <data.h> #include <math.h> #include <utilities.h> // Add your special include files here. // For example, if you want to fit with functions from the NAG library, // add the header file for the NAG functions here. // Add code here for other Origin C functions that you want to define in this file, // and access in your fitting function. // You can access C functions defined in other files, if those files are loaded and compiled // in your workspace, and the functions have been prototyped in a header file that you have // included above. // You can access NLSF object methods and properties directly in your function code. // You should follow C-language syntax in defining your function. // For instance, if your parameter name is P1, you cannot use p1 in your function code. // When using fractions, remember that integer division such as 1/2 is equal to 0, and not 0.5 // Use 0.5 or 1/2.0 to get the correct value. // For more information and examples, please refer to the "User-Defined Fitting Function" // section of the Origin Help file. [ORIGIN C PARAMETER INITIALIZATION HEADER] [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.