Hello everyone,
I am trying to perform an unbinned likelihood fit on multiple weighted (with negative weights) dataset using a double-sided crystal ball function. I would just like to ask something regarding the output of roofit. When I perform the fit, the minimization used are MIGRAD and then HESSE (and when using SumW2Error(kTRUE), another from HESSE). There are times when I fit,
- the result from MIGRAD gives STATUS=FAILED with an error matrix that is NOT POS-DEF, and HESSE will give STATUS=NOT POS-DEF as well as the error matrix (and still STATUS=NOT POS-DEF with SumW2Error(kTRUE)); or
- when I tried using SumW2Error(kTRUE) when fitting, sometimes the results are (MIGRAD: STATUS=FAILED, ERR MATRIX NOT POS-DEF), (HESSE: STATUS=NOT POS-DEF, ERR MATRIX NOT POS-DEF), (HESSE: STATUS=OK, ERR MATRIX ACCURATE).
For these 2 cases, the summary will give (Status: MIGRAD=4, HESSE=0, HESSE=0). Am I misunderstanding the meaning of these numbers. Also, is it enough to just get a STATUS=OK with the last step (case 2)? The plots doesn’t look bad, but I wanted to make sure everything is fine. Also, I believe these NOT POS-DEF status is dues to having large correlations between the parameters. Can changing the range or the initial value fix this issue? Thanks in advance!
Thanks,
John
PS: Here are the ouputs:
CASE 1:
**********
** 13 **MIGRAD 3000 1
**********
FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
START MIGRAD MINIMIZATION. STRATEGY 1. CONVERGENCE WHEN EDM .LT. 1.00e-03
FCN=0.225062 FROM MIGRAD STATUS=INITIATE 22 CALLS 23 TOTAL
EDM= unknown STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 alpha1 1.00000e+00 5.00000e-01 1.38147e-01 -5.04127e-02
2 alpha2 2.00000e+00 1.00000e+00 1.72186e-01 -2.64675e-02
3 mean 1.20000e+02 7.00000e-01 2.01358e-01 9.26646e-03
4 n1 5.00000e+00 1.00000e+00 2.01358e-01 -1.93529e-03
5 n2 3.00000e+00 1.00000e+00 2.21072e-01 -2.57137e-03
6 sigma 2.00000e+00 4.90000e-01 2.06953e-01 4.84354e-02
ERR DEF= 0.5
MIGRAD MINIMIZATION HAS CONVERGED.
MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
EIGENVALUES OF SECOND-DERIVATIVE MATRIX:
-1.0085e-01 8.9084e-02 4.8141e-01 9.3052e-01 2.1701e+00 2.4297e+00
MINUIT WARNING IN HESSE
============== MATRIX FORCED POS-DEF BY ADDING 0.103279 TO DIAGONAL.
FCN=0.214838 FROM HESSE STATUS=NOT POSDEF 40 CALLS 109 TOTAL
EDM=0.000677571 STRATEGY= 1 ERR MATRIX NOT POS-DEF
EXT PARAMETER APPROXIMATE STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 alpha1 1.10541e+00 1.08974e+01 8.24301e-04 -1.55009e-03
2 alpha2 2.14122e+00 1.08998e+01 1.36928e-03 -1.71863e-03
3 mean 1.19997e+02 5.22488e+00 8.74004e-04 1.13886e-03
4 n1 5.71040e+00 6.08209e+00 1.16791e-02 -3.49558e-06
5 n2 3.54571e+00 5.56272e+00 7.01843e-03 -5.79916e-04
6 sigma 1.34387e+00 3.06913e+00 1.22710e-03 -1.36066e-03
ERR DEF= 0.5
MINUIT WARNING IN MIGRAD
============== Negative diagonal element 1 in Error Matrix
MINUIT WARNING IN MIGRAD
============== 7.11845 added to diagonal of error matrix
EIGENVALUES OF SECOND-DERIVATIVE MATRIX:
-3.7417e+00 1.3129e-01 2.6002e-01 8.5668e-01 2.7918e+00 5.7019e+00
MINUIT WARNING IN MIGRAD
============== MATRIX FORCED POS-DEF BY ADDING 3.747401 TO DIAGONAL.
MIGRAD MINIMIZATION HAS CONVERGED.
MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
EIGENVALUES OF SECOND-DERIVATIVE MATRIX:
-6.7841e-02 3.6911e-01 9.2080e-01 1.0670e+00 1.2504e+00 2.4605e+00
MINUIT WARNING IN HESSE
============== MATRIX FORCED POS-DEF BY ADDING 0.070302 TO DIAGONAL.
MIGRAD TERMINATED WITHOUT CONVERGENCE.
FCN=0.213212 FROM MIGRAD STATUS=FAILED 312 CALLS 313 TOTAL
EDM=0.00616415 STRATEGY= 1 ERR MATRIX NOT POS-DEF
EXT PARAMETER APPROXIMATE STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 alpha1 1.06188e+00 8.32772e+00 7.86063e-04 -5.73791e-04
2 alpha2 5.88615e+00 1.24313e+01 6.93316e-03 1.64151e-03
3 mean 1.20031e+02 4.57556e+00 7.91834e-04 1.40678e-03
4 n1 7.93949e+00 8.86974e+00 2.94668e-02 6.21134e-05
5 n2 2.92793e-02 8.61737e+00 1.43119e-02 2.68225e-04
6 sigma 1.37152e+00 3.54979e+00 8.90093e-04 -2.43375e-03
ERR DEF= 0.5
EXTERNAL ERROR MATRIX. NDIM= 25 NPAR= 6 ERR DEF=0.5
6.080e+03 -1.130e+01 -9.616e+02 -2.809e+05 -4.793e+01 4.036e+02
-1.130e+01 2.135e+02 1.966e+00 4.961e+02 -1.171e+01 -1.431e+00
-9.616e+02 1.966e+00 1.791e+02 4.378e+04 8.297e+00 -7.201e+01
-2.809e+05 4.961e+02 4.378e+04 1.308e+07 2.099e+03 -1.796e+04
-4.793e+01 -1.171e+01 8.297e+00 2.099e+03 1.287e+02 -6.240e+00
4.036e+02 -1.431e+00 -7.201e+01 -1.796e+04 -6.240e+00 4.347e+01
ERR MATRIX NOT POS-DEF
PARAMETER CORRELATION COEFFICIENTS
NO. GLOBAL 1 2 3 4 5 6
1 0.99787 1.000 -0.010 -0.922 -0.996 -0.054 0.785
2 0.07383 -0.010 1.000 0.010 0.009 -0.071 -0.015
3 0.93745 -0.922 0.010 1.000 0.905 0.055 -0.816
4 0.99739 -0.996 0.009 0.905 1.000 0.051 -0.753
5 0.11259 -0.054 -0.071 0.055 0.051 1.000 -0.083
6 0.86022 0.785 -0.015 -0.816 -0.753 -0.083 1.000
ERR MATRIX NOT POS-DEF
**********
** 18 **HESSE 3000
**********
EIGENVALUES OF SECOND-DERIVATIVE MATRIX:
-8.6846e-02 2.0290e-01 7.3813e-01 1.0120e+00 1.6239e+00 2.5099e+00
MINUIT WARNING IN HESSE
============== MATRIX FORCED POS-DEF BY ADDING 0.089356 TO DIAGONAL.
FCN=0.213212 FROM HESSE STATUS=NOT POSDEF 46 CALLS 359 TOTAL
EDM=0.00632081 STRATEGY= 1 ERR MATRIX NOT POS-DEF
EXT PARAMETER APPROXIMATE INTERNAL INTERNAL
NO. NAME VALUE ERROR STEP SIZE VALUE
1 alpha1 1.06188e+00 7.76105e+00 1.57213e-04 -1.03217e+00
2 alpha2 5.88615e+00 1.43088e+01 3.66691e-02 -4.23973e-01
3 mean 1.20031e+02 4.23793e+00 1.58367e-04 8.82780e-03
4 n1 7.93949e+00 8.76132e+00 5.89337e-03 6.28458e-01
5 n2 2.92793e-02 8.80694e+00 2.86238e-03 -1.46252e+00
6 sigma 1.37152e+00 3.86742e+00 1.78019e-04 -5.01808e-01
ERR DEF= 0.5
EXTERNAL ERROR MATRIX. NDIM= 25 NPAR= 6 ERR DEF=0.5
5.950e+03 -8.869e+02 -8.844e+02 -2.758e+05 3.560e+01 4.140e+02
-8.869e+02 8.426e+02 1.496e+02 3.831e+04 -5.988e+01 -1.353e+02
-8.844e+02 1.496e+02 1.583e+02 4.029e+04 -6.019e+00 -7.133e+01
-2.758e+05 3.831e+04 4.029e+04 1.289e+07 -1.541e+03 -1.822e+04
3.560e+01 -5.988e+01 -6.019e+00 -1.541e+03 1.298e+02 5.327e+00
4.140e+02 -1.353e+02 -7.133e+01 -1.822e+04 5.327e+00 5.278e+01
ERR MATRIX NOT POS-DEF
PARAMETER CORRELATION COEFFICIENTS
NO. GLOBAL 1 2 3 4 5 6
1 0.99786 1.000 -0.396 -0.911 -0.996 0.041 0.739
2 0.67241 -0.396 1.000 0.410 0.368 -0.181 -0.642
3 0.93025 -0.911 0.410 1.000 0.892 -0.042 -0.780
4 0.99739 -0.996 0.368 0.892 1.000 -0.038 -0.699
5 0.19450 0.041 -0.181 -0.042 -0.038 1.000 0.064
6 0.88857 0.739 -0.642 -0.780 -0.699 0.064 1.000
ERR MATRIX NOT POS-DEF
[#1] INFO:Fitting -- RooAbsPdf::fitTo(SigDBCB) Calculating sum-of-weights-squared correction matrix for covariance matrix
**********
** 23 **HESSE 3000
**********
EIGENVALUES OF SECOND-DERIVATIVE MATRIX:
-1.7569e-01 6.9899e-01 9.7838e-01 1.0141e+00 1.0599e+00 2.4243e+00
MINUIT WARNING IN HESSE
============== MATRIX FORCED POS-DEF BY ADDING 0.178111 TO DIAGONAL.
FCN=6.02809e-05 FROM HESSE STATUS=NOT POSDEF 64 CALLS 423 TOTAL
EDM=4.24395e-06 STRATEGY= 1 ERR MATRIX NOT POS-DEF
EXT PARAMETER APPROXIMATE INTERNAL INTERNAL
NO. NAME VALUE ERROR STEP SIZE VALUE
1 alpha1 1.06188e+00 7.97707e+00 3.20714e-03 -1.03217e+00
2 alpha2 5.88615e+00 1.47026e+01 5.00000e-01 -4.23973e-01
3 mean 1.20031e+02 5.16420e+00 3.23068e-03 8.82780e-03
4 n1 7.93949e+00 7.87641e+00 5.00000e-01 6.28458e-01
5 n2 2.92793e-02 7.91140e+00 5.83926e-02 -1.46252e+00
6 sigma 1.37152e+00 2.75070e+00 3.70421e-01 -5.01808e-01
ERR DEF= 0.5
EXTERNAL ERROR MATRIX. NDIM= 25 NPAR= 6 ERR DEF=0.5
2.292e+07 1.256e+04 -2.686e+06 -1.708e+09 3.531e+02 7.921e+05
1.256e+04 7.901e+05 -4.529e+02 -9.207e+05 8.531e+03 2.144e+03
-2.686e+06 -4.529e+02 3.985e+05 1.981e+08 1.357e+03 -9.725e+04
-1.708e+09 -9.207e+05 1.981e+08 1.280e+11 -1.988e+04 -5.835e+07
3.531e+02 8.531e+03 1.357e+03 -1.988e+04 6.166e+05 1.697e+03
7.921e+05 2.144e+03 -9.725e+04 -5.835e+07 1.697e+03 5.295e+04
ERR MATRIX NOT POS-DEF
PARAMETER CORRELATION COEFFICIENTS
NO. GLOBAL 1 2 3 4 5 6
1 0.99803 1.000 0.003 -0.889 -0.998 0.000 0.719
2 0.01801 0.003 1.000 -0.001 -0.003 0.012 0.010
3 0.89826 -0.889 -0.001 1.000 0.877 0.003 -0.670
4 0.99780 -0.998 -0.003 0.877 1.000 -0.000 -0.709
5 0.01951 0.000 0.012 0.003 -0.000 1.000 0.009
6 0.72988 0.719 0.010 -0.670 -0.709 0.009 1.000
ERR MATRIX NOT POS-DEF
[#1] INFO:Minization -- RooMinuit::optimizeConst: deactivating const optimization
[#1] INFO:InputArguments -- RooAbsData::plotOn(signal) INFO: dataset has non-integer weights, auto-selecting SumW2 errors instead of Poisson errors
[#1] INFO:Plotting -- RooAbsPdf::plotOn(SigDBCB) p.d.f was fitted in range and no explicit plot,norm range was specified, using fit range as default
[#1] INFO:Plotting -- RooAbsPdf::plotOn(SigDBCB) only plotting range 'fit_nll_SigDBCB_signal'
[#1] INFO:Plotting -- RooAbsPdf::plotOn(SigDBCB) p.d.f. curve is normalized using explicit choice of ranges 'fit_nll_SigDBCB_signal'
[#0] ERROR:InputArguments -- RooAbsReal::plotOn(SigDBCB) ERROR: unrecognized command: BinningSpec
RooFitResult: minimized FCN value: 6.02809e-05, estimated distance to minimum: 4.24395e-06
covariance matrix quality: Unknown, matrix was externally provided
Status : MIGRAD=4 HESSE=0 HESSE=0
Floating Parameter FinalValue +/- Error
-------------------- --------------------------
alpha1 1.0619e+00 +/- 1.86e+01
alpha2 5.8861e+00 +/- 2.14e+01
mean 1.2003e+02 +/- 8.94e+00
n1 7.9395e+00 +/- 2.17e+01
n2 2.9279e-02 +/- 9.99e+00
sigma 1.3715e+00 +/- 7.55e+00
CASE 2:
**********
** 13 **MIGRAD 3000 1
**********
FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
ERROR evaluating range...
START MIGRAD MINIMIZATION. STRATEGY 1. CONVERGENCE WHEN EDM .LT. 1.00e-03
FCN=0.112755 FROM MIGRAD STATUS=INITIATE 24 CALLS 25 TOTAL
EDM= unknown STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 alpha1 1.00000e+00 5.00000e-01 1.38147e-01 4.90891e-03
2 alpha2 2.00000e+00 1.00000e+00 1.72186e-01 -2.82151e-03
3 mean 1.20000e+02 7.00000e-01 2.01358e-01 -2.93563e-03
4 n1 5.00000e+00 1.00000e+00 2.01358e-01 1.87818e-04
5 n2 3.00000e+00 1.00000e+00 2.21072e-01 -7.98305e-04
6 sigma 2.00000e+00 4.90000e-01 2.06953e-01 -4.07225e-03
ERR DEF= 0.5
MIGRAD FAILS TO FIND IMPROVEMENT
EIGENVALUES OF SECOND-DERIVATIVE MATRIX:
-7.0874e-01 1.8460e-01 4.4155e-01 1.1050e+00 1.7992e+00 3.1784e+00
MINUIT WARNING IN HESSE
============== MATRIX FORCED POS-DEF BY ADDING 0.711922 TO DIAGONAL.
FCN=0.113173 FROM HESSE STATUS=NOT POSDEF 52 CALLS 78 TOTAL
EDM=0.00104615 STRATEGY= 1 ERR MATRIX NOT POS-DEF
EXT PARAMETER APPROXIMATE STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 alpha1 1.00000e+00 7.69358e+00 1.40909e-02 4.90900e-03
2 alpha2 2.00000e+00 1.64459e+01 1.75630e-02 -2.82187e-03
3 mean 1.20000e+02 3.96195e+00 2.05385e-02 -2.93571e-03
4 n1 5.00000e+00 7.37959e+00 2.05385e-02 1.87813e-04
5 n2 3.00000e+00 6.45618e+00 2.25493e-02 -7.98372e-04
6 sigma 2.00000e+00 3.76048e+00 2.11092e-02 -4.07232e-03
ERR DEF= 0.5
MIGRAD MINIMIZATION HAS CONVERGED.
MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
EIGENVALUES OF SECOND-DERIVATIVE MATRIX:
-4.4278e-01 1.9288e-01 5.1112e-01 1.0542e+00 2.0721e+00 2.6125e+00
MINUIT WARNING IN HESSE
============== MATRIX FORCED POS-DEF BY ADDING 0.445397 TO DIAGONAL.
MIGRAD TERMINATED WITHOUT CONVERGENCE.
FCN=0.112709 FROM MIGRAD STATUS=FAILED 221 CALLS 222 TOTAL
EDM=0.0428003 STRATEGY= 1 ERR MATRIX NOT POS-DEF
EXT PARAMETER APPROXIMATE STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 alpha1 9.04337e-01 9.95792e+00 1.20944e-03 -3.43442e-04
2 alpha2 2.45945e+00 1.76351e+01 4.16449e-03 -1.17314e-03
3 mean 1.20154e+02 4.38016e+00 1.94664e-03 7.02828e-04
4 n1 7.95811e+00 6.83628e+00 6.99276e-02 -1.18922e-05
5 n2 6.86998e+00 5.62303e+00 4.92089e-02 -5.69306e-05
6 sigma 2.24086e+00 3.45516e+00 2.22079e-03 9.89826e-04
ERR DEF= 0.5
EXTERNAL ERROR MATRIX. NDIM= 25 NPAR= 6 ERR DEF=0.5
8.414e+02 4.519e+04 4.159e+02 1.235e+04 -8.256e+04 3.343e+03
4.519e+04 2.658e+06 2.652e+04 8.312e+05 -4.857e+06 1.950e+05
4.159e+02 2.652e+04 4.040e+02 8.062e+03 -4.844e+04 1.907e+03
1.235e+04 8.312e+05 8.062e+03 5.074e+05 -1.519e+06 6.138e+04
-8.256e+04 -4.857e+06 -4.844e+04 -1.519e+06 9.013e+06 -3.563e+05
3.343e+03 1.950e+05 1.907e+03 6.138e+04 -3.563e+05 1.440e+04
ERR MATRIX NOT POS-DEF
PARAMETER CORRELATION COEFFICIENTS
NO. GLOBAL 1 2 3 4 5 6
1 0.97264 1.000 0.956 0.713 0.598 -0.948 0.960
2 0.99813 0.956 1.000 0.809 0.716 -0.992 0.997
3 0.85092 0.713 0.809 1.000 0.563 -0.803 0.791
4 0.79704 0.598 0.716 0.563 1.000 -0.710 0.718
5 0.99237 -0.948 -0.992 -0.803 -0.710 1.000 -0.989
6 0.99751 0.960 0.997 0.791 0.718 -0.989 1.000
ERR MATRIX NOT POS-DEF
**********
** 18 **HESSE 3000
**********
EIGENVALUES OF SECOND-DERIVATIVE MATRIX:
-4.3314e-01 1.7137e-01 4.8782e-01 1.0625e+00 2.1101e+00 2.6014e+00
MINUIT WARNING IN HESSE
============== MATRIX FORCED POS-DEF BY ADDING 0.435745 TO DIAGONAL.
FCN=0.112709 FROM HESSE STATUS=NOT POSDEF 40 CALLS 262 TOTAL
EDM=0.0405129 STRATEGY= 1 ERR MATRIX NOT POS-DEF
EXT PARAMETER APPROXIMATE INTERNAL INTERNAL
NO. NAME VALUE ERROR STEP SIZE VALUE
1 alpha1 9.04337e-01 1.03015e+01 2.41889e-04 -1.07465e+00
2 alpha2 2.45945e+00 1.32684e+01 8.32897e-04 -8.54214e-01
3 mean 1.20154e+02 4.94125e+00 3.89328e-04 4.40645e-02
4 n1 7.95811e+00 5.14661e+00 1.39855e-02 6.33070e-01
5 n2 6.86998e+00 7.39659e+00 9.84177e-03 3.83313e-01
6 sigma 2.24086e+00 3.82376e+00 4.44159e-04 -1.26518e-01
ERR DEF= 0.5
EXTERNAL ERROR MATRIX. NDIM= 25 NPAR= 6 ERR DEF=0.5
8.608e+02 4.494e+04 3.585e+02 1.282e+04 -8.844e+04 3.330e+03
4.494e+04 2.575e+06 2.262e+04 8.478e+05 -5.068e+06 1.892e+05
3.585e+02 2.262e+04 3.404e+02 7.210e+03 -4.450e+04 1.622e+03
1.282e+04 8.478e+05 7.210e+03 5.391e+05 -1.669e+06 6.271e+04
-8.844e+04 -5.068e+06 -4.450e+04 -1.669e+06 1.012e+07 -3.723e+05
3.330e+03 1.892e+05 1.622e+03 6.271e+04 -3.723e+05 1.399e+04
ERR MATRIX NOT POS-DEF
PARAMETER CORRELATION COEFFICIENTS
NO. GLOBAL 1 2 3 4 5 6
1 0.97302 1.000 0.955 0.662 0.595 -0.948 0.960
2 0.99812 0.955 1.000 0.764 0.720 -0.993 0.997
3 0.81855 0.662 0.764 1.000 0.532 -0.758 0.743
4 0.80793 0.595 0.720 0.532 1.000 -0.715 0.722
5 0.99315 -0.948 -0.993 -0.758 -0.715 1.000 -0.990
6 0.99742 0.960 0.997 0.743 0.722 -0.990 1.000
ERR MATRIX NOT POS-DEF
[#1] INFO:Fitting -- RooAbsPdf::fitTo(SigDBCB) Calculating sum-of-weights-squared correction matrix for covariance matrix
**********
** 23 **HESSE 3000
**********
MINUIT WARNING IN HESSE
============== Negative diagonal element 5 in Error Matrix
MINUIT WARNING IN HESSE
============== 1 added to diagonal of error matrix
COVARIANCE MATRIX CALCULATED SUCCESSFULLY
FCN=3.31071e-05 FROM HESSE STATUS=OK 56 CALLS 318 TOTAL
EDM=1.32205e-11 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER INTERNAL INTERNAL
NO. NAME VALUE ERROR STEP SIZE VALUE
1 alpha1 9.04337e-01 3.03186e+00 4.93453e-03 -1.07465e+00
2 alpha2 2.45945e+00 5.52682e+00 5.00000e-01 -8.54214e-01
3 mean 1.20154e+02 2.94227e+00 7.94229e-03 4.40645e-02
4 n1 7.95811e+00 3.39203e+00 2.85305e-01 6.33070e-01
5 n2 6.86998e+00 3.90203e+00 2.00772e-01 3.83313e-01
6 sigma 2.24086e+00 2.04511e+00 9.06084e-03 -1.26518e-01
ERR DEF= 0.5
EXTERNAL ERROR MATRIX. NDIM= 25 NPAR= 6 ERR DEF=0.5
1.275e+01 1.182e-06 -1.922e-04 -6.300e-06 1.613e-07 9.732e-05
1.182e-06 4.314e+01 1.715e-05 1.123e-08 8.085e-07 2.869e-05
-1.922e-04 1.715e-05 1.223e+01 -1.218e-06 1.062e-06 -6.906e-05
-6.300e-06 1.123e-08 -1.218e-06 1.625e+01 1.533e-09 4.747e-07
1.613e-07 8.085e-07 1.062e-06 1.533e-09 2.150e+01 1.695e-06
9.732e-05 2.869e-05 -6.906e-05 4.747e-07 1.695e-06 5.907e+00
PARAMETER CORRELATION COEFFICIENTS
NO. GLOBAL 1 2 3 4 5 6
1 0.00002 1.000 0.000 -0.000 -0.000 0.000 0.000
2 0.00000 0.000 1.000 0.000 0.000 0.000 0.000
3 0.00002 -0.000 0.000 1.000 -0.000 0.000 -0.000
4 0.00000 -0.000 0.000 -0.000 1.000 0.000 0.000
5 0.00000 0.000 0.000 0.000 0.000 1.000 0.000
6 0.00001 0.000 0.000 -0.000 0.000 0.000 1.000
[#1] INFO:Minization -- RooMinuit::optimizeConst: deactivating const optimization
[#1] INFO:InputArguments -- RooAbsData::plotOn(signal) INFO: dataset has non-integer weights, auto-selecting SumW2 errors instead of Poisson errors
[#1] INFO:Plotting -- RooAbsPdf::plotOn(SigDBCB) p.d.f was fitted in range and no explicit plot,norm range was specified, using fit range as default
[#1] INFO:Plotting -- RooAbsPdf::plotOn(SigDBCB) only plotting range 'fit_nll_SigDBCB_signal'
[#1] INFO:Plotting -- RooAbsPdf::plotOn(SigDBCB) p.d.f. curve is normalized using explicit choice of ranges 'fit_nll_SigDBCB_signal'
[#0] ERROR:InputArguments -- RooAbsReal::plotOn(SigDBCB) ERROR: unrecognized command: BinningSpec
RooFitResult: minimized FCN value: 3.31071e-05, estimated distance to minimum: 1.32205e-11
covariance matrix quality: Unknown, matrix was externally provided
Status : MIGRAD=4 HESSE=0 HESSE=0
Floating Parameter FinalValue +/- Error
-------------------- --------------------------
alpha1 9.0434e-01 +/- 5.18e+01
alpha2 2.4595e+00 +/- 6.78e+01
mean 1.2015e+02 +/- 1.97e+01
n1 7.9581e+00 +/- 1.91e+01
n2 6.8700e+00 +/- 3.76e+01
sigma 2.2409e+00 +/- 1.95e+01