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T O P I C R E V I E W
gdroogmans	Posted - 03/18/2004 : 05:06:19 AM I am trying without success to fit several data sets with two different functions, i.e. some data with the first function, others with the second function. Does anyone know a solution for this problem?
2 L A T E S T R E P L I E S (Newest First)
gdroogmans	Posted - 03/18/2004 : 11:35:17 AM Thanks for your fast and ingenious reply
Mike Buess	Posted - 03/18/2004 : 08:36:44 AM This is how I would go about it using the NLSF fitter... 1. Function->Edit or New: combine the functions as follows y = A * func1(x) + (1-A) * func2(x) 2. Action->Dataset: check Fit Multiple datasets at the bottom and Add each dataset to the fitting session. 3. Action->Fit: fix A to 0 or 1 for each dataset and otherwise make sure all parameters are sensibly initialized. Then click one of the iterate buttons. ...Besides fixing A to 0 or 1 you may also need to fix the parameters for the function that is not used to some reasonable values. Mike Buess Origin WebRing Member Edited by - Mike Buess on 03/18/2004 08:56:47 AM

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