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T O P I C R E V I E W
ardaerhan	Posted - 03/04/2005 : 12:05:17 PM Origin Version (Select Help-->About Origin): 7.5 Operating System:Windows XP Hi All, i am performing non linear fitting using the following labtalk commands: // Perform nonlinear fit with ExpDec function using NLSF = LabTalk.NLSF; // Point to LabTalk NLSF object NLSF.Init(); // Initialize NLSF object NLSF.Func$ = "exp"; // Select function NLSF.P1 = A; // Perform parameter initialization NLSF.P2 = L; NLSF.FitData$ = expData.GetName(); // Set fit dataset name NLSF.Wtype = 3; // Set NLSF weighting method to arbitrary dataset NLSF.W$ = expErr.GetName(); // Set error dataset name NLSF.ChiSqrErr = 0; // Turn off scaling of parameters with chisqr NLSF.Fit(100); // Perform 100 iterations NLSF.Fit(100); // Repeat a couple of times to ensure convergence NLSF.Fit(100); // Not all 100 iterations will be performed each time NLSF.PasteParams("P"); // Paste parameters to plot NLSF.End(); // End fitting session what i need is just the parameters of the fitting, i dont want origin to plot the graph, because im performing 100 fits and this takes so long time if it will plot the 100 curves. Thank you Arda
3 L A T E S T R E P L I E S (Newest First)
easwar	Posted - 03/04/2005 : 4:53:05 PM Hi Arda, I tried the function pasted below in 7SR4 and 7.5SR5 and in both cases, I do not get a graph created. Perhaps you can debug the code and see when the graph gets created? Note that I used NLSF.end(13) instead of nlsf.end() - but that is to turn off reporting to result log, turn off the result worksheet etc. and using 13 or leaving it as no argument both did not create a graph for me. Easwar OriginLab void test() { using NLSF = LabTalk.NLSF; NLSF.Init(); NLSF.output(0); NLSF.Func$ = "expdecay1"; NLSF.P1 = 70; NLSF.P2 = 0.01; NLSF.P3 = 80; NLSF.P4 = 0.2235; NLSF.V4 = 0; NLSF.FitData$ = "data1_b"; NLSF.Wtype = 3; NLSF.W$ = "data1_c"; NLSF.ChiSqrErr = 0; NLSF.IterateEx(100); NLSF.IterateEx(100); NLSF.IterateEx(100); NLSF.End(13); }
ardaerhan	Posted - 03/04/2005 : 4:08:43 PM Hi Easwar; I did as you said : using NLSF = LabTalk.NLSF; NLSF.Init(); NLSF.output(0); NLSF.Func$ = "user6"; NLSF.P1 = Io; NLSF.P2 = p; NLSF.P3 = xo; NLSF.P4 = dL; NLSF.V4 = 0; NLSF.FitData$ = cosData.GetName(); NLSF.Wtype = 3; NLSF.W$ = D.GetName(); NLSF.ChiSqrErr = 0; NLSF.IterateEx(100); NLSF.End(); but im still getting the graphs? is there a problem with what i did. thank you for your help quote: Hi Arda, Add the following line right after NLSF.Init(): NLSF.output(0); Also, please change the lines NLSF.Fit(100) to NLSF.IterateEx(100); Otherwise you will get multiple NLSF result worskheets - this was a mistake in the example area - we will update. You should also then remove the line NLSF.PasteParams("P") Easwar OriginLab
easwar	Posted - 03/04/2005 : 12:29:26 PM Hi Arda, Add the following line right after NLSF.Init(): NLSF.output(0); Also, please change the lines NLSF.Fit(100) to NLSF.IterateEx(100); Otherwise you will get multiple NLSF result worskheets - this was a mistake in the example area - we will update. You should also then remove the line NLSF.PasteParams("P") Easwar OriginLab

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