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moritzo
1 Posts |
 Posted - 11/05/2008 : 4:18:09 PM
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Origin 7.5, windows XP
I have a function which is supposed to create a plot and then use NLSF to generate a fit. The problem I am running into is that the fit always replaces the original plot and I can't seem to get them to both show up. By the end of the fitting the orignal data curve has always been replaced and I can't seem to add it after the fact to the plot. I appreciate any suggestions The code is below:
vector fitter(Curve temp_data, int downRange, int upRange, string func)
{ //pass to this function the curve to be fit with the range and the fitting function and it will return
//creates a visible plot
GraphPage TET; //Graphs results of fits
GraphLayer TOT;
DataPlot TAT;
vector params(10);
string data_name;
using NLSF = LabTalk.NLSF; //NLSF is the fitting engine
NLSF.Init(); // initialize fitter
NLSF.PasteToPlot = 1; // turn off pasting results to graph
NLSF.Func$ = func; // assign fitting function
NLSF.numReplica=0;
temp_data.GetName(data_name);
TET.Create(NULL, CREATE_TEMP);
TOT=TET.Layers(0);
set_active_layer(TOT);
TOT.AddPlot(temp_data);
TAT=TOT.DataPlots(0);
TOT.Rescale();
TET.Rename(temp_data.GetName());
TAT.SetRange(downRange,upRange); //Sets the range of the fitting
NLSF.begin();
NLSF.cleanUpFitData();
NLSF.msgPrompt=0;
NLSF.FitData$ = data_name; // assign fitting dataset
NLSF.dataBegin=downRange;
NLSF.dataEnd=upRange;
NLSF.Execute("parainit"); // perform auto parameter initialization
NLSF.Fit(300); // perform fit
params[0]=NLSF.P1;
params[1]=NLSF.P2;
params[2]=NLSF.P3;
NLSF.pasteParams("P");
NLSF.end(13);
NLSF.unInit();
// TET.Show(FALSE);
TET.Detach();
return params;
}
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Iris_Bai
China
Posts |
Posted - 11/11/2008 : 10:52:31 PM
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Hi,
Please change your function fitter phototype "Curve temp_data" to "Curve& temp_data", add & after Curve, and try again.
If NOT add &, pass Curve will do copy a Curve as temp and then pass to function, you can print data_name to see, the name begining with "TMP_".
If added &, the name will be real name from data.
Iris |
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fitting a plot