[ROOT Fitting] 複数のフィット関数を同時に表示する




TF1 *fitFunction1=new TF1("fitFunction1","gaus(0)+pol1(3)");
TF1 *fitFunction2=new TF1("fitFunction2","gaus(0)+pol1(3)");
histogram->Fit("fitFunction1", "+", "", fitRangeLower, fitRangeUpper);
histogram->Fit("fitFunction2", "+", "", fitRangeLower, fitRangeUpper);



      The list of fit options is given in parameter option.
         option = "W"  Set all weights to 1 for non empty bins; ignore error bars
                = "WW" Set all weights to 1 including empty bins; ignore error bars
                = "I"  Use integral of function in bin, normalized by the bin volume,
                       instead of value at bin center
                = "L"  Use Loglikelihood method (default is chisquare method)
                = "WL" Use Loglikelihood method and bin contents are not integer,
                       i.e. histogram is weighted (must have Sumw2() set)
                = "U"  Use a User specified fitting algorithm (via SetFCN)
                = "Q"  Quiet mode (minimum printing)
                = "V"  Verbose mode (default is between Q and V)
                = "E"  Perform better Errors estimation using Minos technique
                = "B"  User defined parameter settings are used for predefined functions
                       like "gaus", "expo", "poln", "landau".
                       Use this option when you want to fix one or more parameters for these functions.
                = "M"  More. Improve fit results.
                       It uses the IMPROVE command of TMinuit (see TMinuit::mnimpr).
                       This algorithm attempts to improve the found local minimum by searching for a
                       better one.
                = "R"  Use the Range specified in the function range
                = "N"  Do not store the graphics function, do not draw
                = "0"  Do not plot the result of the fit. By default the fitted function
                       is drawn unless the option"N" above is specified.
                = "+"  Add this new fitted function to the list of fitted functions
                       (by default, any previous function is deleted)
                = "C"  In case of linear fitting, don't calculate the chisquare
                       (saves time)
                = "F"  If fitting a polN, switch to minuit fitter
                = "S"  The result of the fit is returned in the TFitResultPtr
                       (see below Access to the Fit Result)