Hello,
I am having a problem with Minuit returning “FUNCTION VALUE DOES NOT SEEM TO DEPEND ON ANY OF THE 1 VARIABLE PARAMETERS”. I have 12 variables of which I am fixing 11 and varying one. When I manually scan through the data, I can clearly see it does vary between the limits I have given. Why might the function not varying properly?
I have attached my full code and a graph of the manual scan in case you want to look. The three sections of code involving Minuit are “minimisation”, “fcn” and “scan”. “ScanCuts” is where I perform the manual scan.
SLT_NR_MVC.C (24.5 KB)1. mBB_Scan_t>tcut 1. mBB_Scan_t<tcut 1. mBB_ManualScan_Weights
Hello @LaurenC ,
if Minuit tells that it’s not varying, I would believe that this is the case. I can imagine several reasons for that:
In setting the parameters constant, you might have accidentally set one constant which you didn’t want to set constant.single parameter to Minuit, so it sees a one-parameter fit problem. Now, it should work if what I described above was the problem.
The other option could be that the step size or the limits of the parameters are wrong such that Minuit doesn’t see any difference. Please try to set the print level to 1 (or maybe even higher, I don’t know the exact meaning of the values), and see what Minuit says.
PS:
Hi Stephan,
I have checked the function and the correct variables are being varied. This is the output for the first parameter being varied:
Processing SLT_NR_MVC.C...
PARAMETER DEFINITIONS:
NO. NAME VALUE STEP SIZE LIMITS
1 mBB_t>tcut 7.20000e+01 1.00000e-01 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 9.80000e+01 5.00000e-01 7.00000e+01 1.10000e+02
3 mHH_t>tcut 3.38000e+02 5.00000e-01 2.50000e+02 7.00000e+02
4 drBB_t>tcut 7.60000e-01 1.00000e-03 4.00000e-01 2.00000e+00
5 drLepTau_t>tcut 6.00000e-01 1.00000e-03 4.00000e-01 2.00000e+00
6 mtLepMet_t>tcut 1.50000e+01 5.00000e-01 0.00000e+00 2.00000e+02
7 mBB_t<tcut 1.41000e+02 5.00000e-01 1.30000e+02 5.00000e+02
8 mMMC_t<tcut 4.76000e+02 5.00000e-01 1.10000e+02 5.00000e+02
9 mHH_t<tcut 3.93921e+06 5.00000e-01 no limits
10 drBB_t<tcut 4.70000e+00 1.00000e-03 1.00000e+00 5.00000e+00
11 drLepTau_t<tcut 4.90000e+00 1.00000e-03 4.00000e-01 5.00000e+00
12 mtLepMet_t<tcut 1.90000e+02 5.00000e-01 0.00000e+00 2.00000e+02
**********
** 1 **FIX 2
**********
**********
** 2 **FIX 3
**********
**********
** 3 **FIX 4
**********
**********
** 4 **FIX 5
**********
**********
** 5 **FIX 6
**********
**********
** 6 **FIX 7
**********
**********
** 7 **FIX 8
**********
**********
** 8 **FIX 9
**********
**********
** 9 **FIX 10
**********
**********
** 10 **FIX 11
**********
**********
** 11 **FIX 12
**********
**********
** 12 **SIMPLEX 1000 0.1
**********
FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
START SIMPLEX MINIMIZATION. CONVERGENCE WHEN EDM .LT. 0.1
FCN=-0.204024 FROM SIMPLEX STATUS=PROGRESS 3 CALLS 4 TOTAL
EDM=0.000165619 STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS PHYSICAL LIMITS
NO. NAME VALUE ERROR NEGATIVE POSITIVE
1 mBB_t>tcut 7.20000e+01 1.00000e-01 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 9.80000e+01 fixed 7.00000e+01 1.10000e+02
3 mHH_t>tcut 3.38000e+02 fixed 2.50000e+02 7.00000e+02
4 drBB_t>tcut 7.60000e-01 fixed 4.00000e-01 2.00000e+00
5 drLepTau_t>tcut 6.00000e-01 fixed 4.00000e-01 2.00000e+00
6 mtLepMet_t>tcut 1.50000e+01 fixed 0.00000e+00 2.00000e+02
7 mBB_t<tcut 1.41000e+02 fixed 1.30000e+02 5.00000e+02
8 mMMC_t<tcut 4.76000e+02 fixed 1.10000e+02 5.00000e+02
9 mHH_t<tcut 3.93921e+06 fixed
10 drBB_t<tcut 4.70000e+00 fixed 1.00000e+00 5.00000e+00
11 drLepTau_t<tcut 4.90000e+00 fixed 4.00000e-01 5.00000e+00
12 mtLepMet_t<tcut 1.90000e+02 fixed 0.00000e+00 2.00000e+02
SIMPLEX MINIMIZATION HAS CONVERGED.
FCN=-0.204024 FROM SIMPLEX STATUS=PROGRESS 8 CALLS 9 TOTAL
EDM=4.34069e-06 STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS PHYSICAL LIMITS
NO. NAME VALUE ERROR NEGATIVE POSITIVE
1 mBB_t>tcut 7.20000e+01 1.00000e-01 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 9.80000e+01 fixed 7.00000e+01 1.10000e+02
3 mHH_t>tcut 3.38000e+02 fixed 2.50000e+02 7.00000e+02
4 drBB_t>tcut 7.60000e-01 fixed 4.00000e-01 2.00000e+00
5 drLepTau_t>tcut 6.00000e-01 fixed 4.00000e-01 2.00000e+00
6 mtLepMet_t>tcut 1.50000e+01 fixed 0.00000e+00 2.00000e+02
7 mBB_t<tcut 1.41000e+02 fixed 1.30000e+02 5.00000e+02
8 mMMC_t<tcut 4.76000e+02 fixed 1.10000e+02 5.00000e+02
9 mHH_t<tcut 3.93921e+06 fixed
10 drBB_t<tcut 4.70000e+00 fixed 1.00000e+00 5.00000e+00
11 drLepTau_t<tcut 4.90000e+00 fixed 4.00000e-01 5.00000e+00
12 mtLepMet_t<tcut 1.90000e+02 fixed 0.00000e+00 2.00000e+02
**********
** 13 **MIGRAD 2e+04 0.1
**********
START MIGRAD MINIMIZATION. STRATEGY 1. CONVERGENCE WHEN EDM .LT. 1.00e-04
FCN=-0.204024 FROM MIGRAD STATUS=INITIATE 6 CALLS 15 TOTAL
EDM= unknown STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 1.00000e-01 1.16642e-04 -6.13046e-02
2 mMMC_t>tcut 9.80000e+01 fixed
3 mHH_t>tcut 3.38000e+02 fixed
4 drBB_t>tcut 7.60000e-01 fixed
5 drLepTau_t>tcut 6.00000e-01 fixed
6 mtLepMet_t>tcut 1.50000e+01 fixed
7 mBB_t<tcut 1.41000e+02 fixed
8 mMMC_t<tcut 4.76000e+02 fixed
9 mHH_t<tcut 3.93921e+06 fixed
10 drBB_t<tcut 4.70000e+00 fixed
11 drLepTau_t<tcut 4.90000e+00 fixed
12 mtLepMet_t<tcut 1.90000e+02 fixed
MIGRAD FAILS TO FIND IMPROVEMENT
COVARIANCE MATRIX CALCULATED SUCCESSFULLY
FCN=-0.204024 FROM HESSE STATUS=OK 5 CALLS 29 TOTAL
EDM=1.75655e-07 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 4.68875e-01 1.14611e-05 -6.13046e-02
2 mMMC_t>tcut 9.80000e+01 fixed
3 mHH_t>tcut 3.38000e+02 fixed
4 drBB_t>tcut 7.60000e-01 fixed
5 drLepTau_t>tcut 6.00000e-01 fixed
6 mtLepMet_t>tcut 1.50000e+01 fixed
7 mBB_t<tcut 1.41000e+02 fixed
8 mMMC_t<tcut 4.76000e+02 fixed
9 mHH_t<tcut 3.93921e+06 fixed
10 drBB_t<tcut 4.70000e+00 fixed
11 drLepTau_t<tcut 4.90000e+00 fixed
12 mtLepMet_t<tcut 1.90000e+02 fixed
MIGRAD FAILS TO FIND IMPROVEMENT
MIGRAD MINIMIZATION HAS CONVERGED.
FCN=-0.204024 FROM MIGRAD STATUS=CONVERGED 29 CALLS 38 TOTAL
EDM=1.75655e-07 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 4.68875e-01 0.00000e+00 -6.13046e-02
2 mMMC_t>tcut 9.80000e+01 fixed
3 mHH_t>tcut 3.38000e+02 fixed
4 drBB_t>tcut 7.60000e-01 fixed
5 drLepTau_t>tcut 6.00000e-01 fixed
6 mtLepMet_t>tcut 1.50000e+01 fixed
7 mBB_t<tcut 1.41000e+02 fixed
8 mMMC_t<tcut 4.76000e+02 fixed
9 mHH_t<tcut 3.93921e+06 fixed
10 drBB_t<tcut 4.70000e+00 fixed
11 drLepTau_t<tcut 4.90000e+00 fixed
12 mtLepMet_t<tcut 1.90000e+02 fixed
EXTERNAL ERROR MATRIX. NDIM= 25 NPAR= 1 ERR DEF=1
2.199e-01
fmin = -0.204024 fedm = 1.75655e-07 errdef = 1
npari = 1 nparx = 12 istat = 3
minimisation of variable mBB complete
**********
** 14 **SCAN 1 1000 0 500
**********
1SCAN OF PARAMETER NO. 1, mBB_t>tcut
FCN=-0.204653 FROM SCAn STATUS=IMPROVED 98 CALLS 136 TOTAL
EDM=1.75655e-07 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.25773e+01 4.68875e-01 0.00000e+00 -6.13046e-02
2 mMMC_t>tcut 9.80000e+01 fixed
3 mHH_t>tcut 3.38000e+02 fixed
4 drBB_t>tcut 7.60000e-01 fixed
5 drLepTau_t>tcut 6.00000e-01 fixed
6 mtLepMet_t>tcut 1.50000e+01 fixed
7 mBB_t<tcut 1.41000e+02 fixed
8 mMMC_t<tcut 4.76000e+02 fixed
9 mHH_t<tcut 3.93921e+06 fixed
10 drBB_t<tcut 4.70000e+00 fixed
11 drLepTau_t<tcut 4.90000e+00 fixed
12 mtLepMet_t<tcut 1.90000e+02 fixed
Minuit Scan of variable mBB complete
I have also copied the function being varied across to an independent program (Debugger.C ). Using the same step size as in the original program, I get the output as follows
-0.765405
-0.765305
-0.766735
-0.769408
-0.770576
-0.771739
-0.771381
-0.775027
-0.776778
-0.779103
-0.78016
-0.782176
-0.782192
-0.783223
-0.789127
-0.789694
-0.792568
-0.794006
-0.793174
-0.796097
-0.797191
-0.798299
-0.799581
-0.801503
-0.800177
-0.800834
-0.802493
-0.80179
-0.801491
-0.801909
-0.801204
-0.801495
-0.801737
-0.8036
-0.802146
-0.800773
-0.801458
-0.800649
-0.79987
-0.801596
-0.804093
-0.80212
-0.801902
-0.801048
-0.797642
-0.794917
-0.792488
-0.78976
-0.790293
-0.791761
-0.787314
-0.787479
-0.785306
-0.782195
-0.779243
-0.781717
-0.780358
-0.773069
-0.769074
-0.764908
-0.762448
-0.756819
-0.750118
-0.746669
-0.743766
-0.74143
-0.737782
-0.732341
-0.72835
-0.723767
-0.717361
-0.713588
-0.707883
-0.704866
-0.703363
-0.696127
-0.691288
-0.684597
-0.676998
-0.67317
-0.665537
-0.655273
-0.650654
-0.639559
-0.631936
-0.62133
-0.61365
-0.603949
-0.598159
-0.589639
-0.578692
-0.569387
-0.556595
-0.544622
-0.540233
-0.53507
-0.539645
-0.527293
-0.512176
-0.497716
Have you any ideas of where I’m going wrong?
What I see is that the function always has the same value, at least when it’s being evaluate by Minuit. It’s unclear why Minuit doesn’t understand what’s going on.
I can only suggest again to remove all the overhead, and only pass a one-parameter function to Minuit.
Further, I would suggest to try Minuit2. It might give different diagnostics.
Hi Stephen.
I have run it with one variable (but two cuts) and it works fine. However if I run it with more than one I am having the same problem.
Processing Debugger2.C...
PARAMETER DEFINITIONS:
NO. NAME VALUE STEP SIZE LIMITS
1 mBB_t>tcut 7.20000e+01 1.00000e-01 3.00000e+01 1.00000e+02
2 mBB_t<tcut 1.41000e+02 5.00000e-01 1.30000e+02 5.00000e+02
**********
** 1 **FIX 2
**********
**********
** 2 **SIMPLEX 1000 0.1
**********
FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
START SIMPLEX MINIMIZATION. CONVERGENCE WHEN EDM .LT. 0.1
FCN=-0.687754 FROM SIMPLEX STATUS=PROGRESS 6 CALLS 7 TOTAL
EDM=0.0222201 STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS PHYSICAL LIMITS
NO. NAME VALUE ERROR NEGATIVE POSITIVE
1 mBB_t>tcut 8.34192e+01 1.00000e-01 3.00000e+01 1.00000e+02
2 mBB_t<tcut 1.41000e+02 fixed 1.30000e+02 5.00000e+02
SIMPLEX MINIMIZATION HAS CONVERGED.
FCN=-0.692786 FROM SIMPLEX STATUS=PROGRESS 11 CALLS 12 TOTAL
EDM=0.00137296 STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS PHYSICAL LIMITS
NO. NAME VALUE ERROR NEGATIVE POSITIVE
1 mBB_t>tcut 8.83567e+01 1.00000e-01 3.00000e+01 1.00000e+02
2 mBB_t<tcut 1.41000e+02 fixed 1.30000e+02 5.00000e+02
**********
** 3 **MIGRAD 2e+04 0.1
**********
START MIGRAD MINIMIZATION. STRATEGY 1. CONVERGENCE WHEN EDM .LT. 1.00e-04
FCN=-0.692807 FROM MIGRAD STATUS=INITIATE 19 CALLS 31 TOTAL
EDM= unknown STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 8.83593e+01 1.00000e-01 1.00266e-04 -1.51770e-01
2 mBB_t<tcut 1.41000e+02 fixed
MIGRAD FAILS TO FIND IMPROVEMENT
COVARIANCE MATRIX CALCULATED SUCCESSFULLY
FCN=-0.692807 FROM HESSE STATUS=OK 5 CALLS 43 TOTAL
EDM=2.71009e-07 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 8.83593e+01 1.78804e-01 7.14262e-06 -1.51770e-01
2 mBB_t<tcut 1.41000e+02 fixed
MIGRAD FAILS TO FIND IMPROVEMENT
MIGRAD MINIMIZATION HAS CONVERGED.
FCN=-0.692807 FROM MIGRAD STATUS=CONVERGED 38 CALLS 50 TOTAL
EDM=2.71009e-07 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 8.83593e+01 1.78804e-01 0.00000e+00 -1.51770e-01
2 mBB_t<tcut 1.41000e+02 fixed
EXTERNAL ERROR MATRIX. NDIM= 25 NPAR= 1 ERR DEF=1
3.197e-02
fmin = -0.692807 fedm = 2.71009e-07 errdef = 1
npari = 1 nparx = 2 istat = 3
minimisation of variable mBB complete
**********
** 4 **SCAN 1 1000 0 500
**********
1SCAN OF PARAMETER NO. 1, mBB_t>tcut
FCN=-0.693257 FROM SCAn STATUS=IMPROVED 98 CALLS 148 TOTAL
EDM=2.71009e-07 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 8.77320e+01 1.78804e-01 0.00000e+00 -1.51770e-01
2 mBB_t<tcut 1.41000e+02 fixed
Minuit Scan of variable mBB complete
PARAMETER DEFINITIONS:
NO. NAME VALUE STEP SIZE LIMITS
1 mBB_t>tcut 7.20000e+01 1.00000e-01 3.00000e+01 1.00000e+02
2 mBB_t<tcut 1.41000e+02 5.00000e-01 1.30000e+02 5.00000e+02
**********
** 1 **FIX 1
**********
**********
** 2 **SIMPLEX 1000 0.1
**********
FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
START SIMPLEX MINIMIZATION. CONVERGENCE WHEN EDM .LT. 0.1
FCN=-0.665698 FROM SIMPLEX STATUS=PROGRESS 3 CALLS 4 TOTAL
EDM=0.000163657 STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS PHYSICAL LIMITS
NO. NAME VALUE ERROR NEGATIVE POSITIVE
1 mBB_t>tcut 7.20000e+01 fixed 3.00000e+01 1.00000e+02
2 mBB_t<tcut 1.40801e+02 5.00000e-01 1.30000e+02 5.00000e+02
SIMPLEX MINIMIZATION HAS CONVERGED.
FCN=-0.665861 FROM SIMPLEX STATUS=PROGRESS 8 CALLS 9 TOTAL
EDM=0.00013474 STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS PHYSICAL LIMITS
NO. NAME VALUE ERROR NEGATIVE POSITIVE
1 mBB_t>tcut 7.20000e+01 fixed 3.00000e+01 1.00000e+02
2 mBB_t<tcut 1.40751e+02 5.00000e-01 1.30000e+02 5.00000e+02
**********
** 3 **MIGRAD 2e+04 0.1
**********
START MIGRAD MINIMIZATION. STRATEGY 1. CONVERGENCE WHEN EDM .LT. 1.00e-04
FCN=-0.665861 FROM MIGRAD STATUS=INITIATE 6 CALLS 15 TOTAL
EDM= unknown STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 fixed
2 mBB_t<tcut 1.40751e+02 5.00000e-01 7.95658e-04 1.85323e-01
MIGRAD FAILS TO FIND IMPROVEMENT
COVARIANCE MATRIX CALCULATED SUCCESSFULLY
FCN=-0.665861 FROM HESSE STATUS=OK 5 CALLS 26 TOTAL
EDM=2.31021e-06 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 fixed
2 mBB_t<tcut 1.40751e+02 1.01938e+00 8.73066e-06 1.85323e-01
MIGRAD FAILS TO FIND IMPROVEMENT
MIGRAD MINIMIZATION HAS CONVERGED.
FCN=-0.665861 FROM MIGRAD STATUS=CONVERGED 23 CALLS 32 TOTAL
EDM=2.31021e-06 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 fixed
2 mBB_t<tcut 1.40751e+02 1.01938e+00 -0.00000e+00 1.85323e-01
EXTERNAL ERROR MATRIX. NDIM= 25 NPAR= 1 ERR DEF=1
1.039e+00
fmin = -0.665861 fedm = 2.31021e-06 errdef = 1
npari = 1 nparx = 2 istat = 3
minimisation of variable The Minimization p complete
**********
** 4 **SCAN 2 1000 0 500
**********
1SCAN OF PARAMETER NO. 2, mBB_t<tcut
FCN=-0.665861 FROM SCAn STATUS= NO CHANGE 98 CALLS 130 TOTAL
EDM=2.31021e-06 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 fixed
2 mBB_t<tcut 1.40751e+02 1.01938e+00 -0.00000e+00 1.85323e-01
Minuit Scan of variable mBB complete
However as soon as I add a second variable it starts misbehaving
Processing Debugger2.C...
PARAMETER DEFINITIONS:
NO. NAME VALUE STEP SIZE LIMITS
1 mBB_t>tcut 7.20000e+01 1.00000e-01 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 9.80000e+01 5.00000e-01 7.00000e+01 1.10000e+02
3 mBB_t<tcut 1.41000e+02 5.00000e-01 1.30000e+02 5.00000e+02
4 mMMC_t<tcut 4.76000e+02 5.00000e-01 1.10000e+02 5.00000e+02
**********
** 1 **FIX 2
**********
**********
** 2 **FIX 3
**********
**********
** 3 **FIX 4
**********
**********
** 4 **SIMPLEX 1000 0.1
**********
FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
START SIMPLEX MINIMIZATION. CONVERGENCE WHEN EDM .LT. 0.1
FCN=-0.204024 FROM SIMPLEX STATUS=PROGRESS 3 CALLS 4 TOTAL
EDM=0.000165619 STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS PHYSICAL LIMITS
NO. NAME VALUE ERROR NEGATIVE POSITIVE
1 mBB_t>tcut 7.20000e+01 1.00000e-01 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 9.80000e+01 fixed 7.00000e+01 1.10000e+02
3 mBB_t<tcut 1.41000e+02 fixed 1.30000e+02 5.00000e+02
4 mMMC_t<tcut 4.76000e+02 fixed 1.10000e+02 5.00000e+02
SIMPLEX MINIMIZATION HAS CONVERGED.
FCN=-0.204024 FROM SIMPLEX STATUS=PROGRESS 8 CALLS 9 TOTAL
EDM=4.34069e-06 STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS PHYSICAL LIMITS
NO. NAME VALUE ERROR NEGATIVE POSITIVE
1 mBB_t>tcut 7.20000e+01 1.00000e-01 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 9.80000e+01 fixed 7.00000e+01 1.10000e+02
3 mBB_t<tcut 1.41000e+02 fixed 1.30000e+02 5.00000e+02
4 mMMC_t<tcut 4.76000e+02 fixed 1.10000e+02 5.00000e+02
**********
** 5 **MIGRAD 2e+04 0.1
**********
START MIGRAD MINIMIZATION. STRATEGY 1. CONVERGENCE WHEN EDM .LT. 1.00e-04
FCN=-0.204024 FROM MIGRAD STATUS=INITIATE 6 CALLS 15 TOTAL
EDM= unknown STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 1.00000e-01 1.16642e-04 -6.13046e-02
2 mMMC_t>tcut 9.80000e+01 fixed
3 mBB_t<tcut 1.41000e+02 fixed
4 mMMC_t<tcut 4.76000e+02 fixed
MIGRAD FAILS TO FIND IMPROVEMENT
COVARIANCE MATRIX CALCULATED SUCCESSFULLY
FCN=-0.204024 FROM HESSE STATUS=OK 5 CALLS 29 TOTAL
EDM=1.75655e-07 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 4.68875e-01 1.14611e-05 -6.13046e-02
2 mMMC_t>tcut 9.80000e+01 fixed
3 mBB_t<tcut 1.41000e+02 fixed
4 mMMC_t<tcut 4.76000e+02 fixed
MIGRAD FAILS TO FIND IMPROVEMENT
MIGRAD MINIMIZATION HAS CONVERGED.
FCN=-0.204024 FROM MIGRAD STATUS=CONVERGED 29 CALLS 38 TOTAL
EDM=1.75655e-07 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 4.68875e-01 0.00000e+00 -6.13046e-02
2 mMMC_t>tcut 9.80000e+01 fixed
3 mBB_t<tcut 1.41000e+02 fixed
4 mMMC_t<tcut 4.76000e+02 fixed
EXTERNAL ERROR MATRIX. NDIM= 25 NPAR= 1 ERR DEF=1
2.199e-01
fmin = -0.204024 fedm = 1.75655e-07 errdef = 1
npari = 1 nparx = 4 istat = 3
minimisation of variable mBB complete
**********
** 6 **SCAN 1 1000 0 500
**********
1SCAN OF PARAMETER NO. 1, mBB_t>tcut
FCN=-0.204653 FROM SCAn STATUS=IMPROVED 98 CALLS 136 TOTAL
EDM=1.75655e-07 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.25773e+01 4.68875e-01 0.00000e+00 -6.13046e-02
2 mMMC_t>tcut 9.80000e+01 fixed
3 mBB_t<tcut 1.41000e+02 fixed
4 mMMC_t<tcut 4.76000e+02 fixed
Minuit Scan of variable mBB complete
PARAMETER DEFINITIONS:
NO. NAME VALUE STEP SIZE LIMITS
1 mBB_t>tcut 7.20000e+01 1.00000e-01 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 9.80000e+01 5.00000e-01 7.00000e+01 1.10000e+02
3 mBB_t<tcut 1.41000e+02 5.00000e-01 1.30000e+02 5.00000e+02
4 mMMC_t<tcut 4.76000e+02 5.00000e-01 1.10000e+02 5.00000e+02
**********
** 1 **FIX 1
**********
**********
** 2 **FIX 2
**********
**********
** 3 **FIX 4
**********
**********
** 4 **SIMPLEX 1000 0.1
**********
FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
START SIMPLEX MINIMIZATION. CONVERGENCE WHEN EDM .LT. 0.1
FUNCTION VALUE DOES NOT SEEM TO DEPEND ON ANY OF THE 1 VARIABLE PARAMETERS.
VERIFY THAT STEP SIZES ARE BIG ENOUGH AND CHECK FCN LOGIC.
*******************************************************************************
*******************************************************************************
FCN=-0.204024 FROM SIMPLEX STATUS=PROGRESS 6 CALLS 7 TOTAL
EDM=0 STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS PHYSICAL LIMITS
NO. NAME VALUE ERROR NEGATIVE POSITIVE
1 mBB_t>tcut 7.20000e+01 fixed 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 9.80000e+01 fixed 7.00000e+01 1.10000e+02
3 mBB_t<tcut 1.41000e+02 5.00000e-01 1.30000e+02 5.00000e+02
4 mMMC_t<tcut 4.76000e+02 fixed 1.10000e+02 5.00000e+02
FUNCTION VALUE DOES NOT SEEM TO DEPEND ON ANY OF THE 1 VARIABLE PARAMETERS.
VERIFY THAT STEP SIZES ARE BIG ENOUGH AND CHECK FCN LOGIC.
*******************************************************************************
*******************************************************************************
FUNCTION VALUE DOES NOT SEEM TO DEPEND ON ANY OF THE 1 VARIABLE PARAMETERS.
VERIFY THAT STEP SIZES ARE BIG ENOUGH AND CHECK FCN LOGIC.
*******************************************************************************
*******************************************************************************
SIMPLEX MINIMIZATION HAS CONVERGED.
FCN=-0.204024 FROM SIMPLEX STATUS=PROGRESS 11 CALLS 12 TOTAL
EDM=0 STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS PHYSICAL LIMITS
NO. NAME VALUE ERROR NEGATIVE POSITIVE
1 mBB_t>tcut 7.20000e+01 fixed 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 9.80000e+01 fixed 7.00000e+01 1.10000e+02
3 mBB_t<tcut 1.41000e+02 5.00000e-01 1.30000e+02 5.00000e+02
4 mMMC_t<tcut 4.76000e+02 fixed 1.10000e+02 5.00000e+02
**********
** 5 **MIGRAD 2e+04 0.1
**********
START MIGRAD MINIMIZATION. STRATEGY 1. CONVERGENCE WHEN EDM .LT. 1.00e-04
FCN=-0.204024 FROM MIGRAD STATUS=INITIATE 17 CALLS 29 TOTAL
EDM= unknown STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 fixed
2 mMMC_t>tcut 9.80000e+01 fixed
3 mBB_t<tcut 1.41000e+02 5.00000e-01 0.00000e+00 0.00000e+00
4 mMMC_t<tcut 4.76000e+02 fixed
MIGRAD MINIMIZATION HAS CONVERGED.
MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
MINUIT WARNING IN HESSE
============== Second derivative zero for parameter3
MNHESS FAILS AND WILL RETURN DIAGONAL MATRIX.
FCN=-0.204024 FROM HESSE STATUS=FAILED 7 CALLS 36 TOTAL
EDM=0 STRATEGY= 1 ERROR MATRIX UNCERTAINTY 100.0 per cent
EXT PARAMETER APPROXIMATE STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 fixed
2 mMMC_t>tcut 9.80000e+01 fixed
3 mBB_t<tcut 1.41000e+02 2.27397e+02 0.00000e+00 0.00000e+00
4 mMMC_t<tcut 4.76000e+02 fixed
MIGRAD MINIMIZATION HAS CONVERGED.
MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
MINUIT WARNING IN HESSE
============== Second derivative zero for parameter3
MNHESS FAILS AND WILL RETURN DIAGONAL MATRIX.
FCN=-0.204024 FROM MIGRAD STATUS=CONVERGED 31 CALLS 43 TOTAL
EDM=0 STRATEGY= 1 ERROR MATRIX UNCERTAINTY 100.0 per cent
EXT PARAMETER APPROXIMATE STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 fixed
2 mMMC_t>tcut 9.80000e+01 fixed
3 mBB_t<tcut 1.41000e+02 2.27397e+02 0.00000e+00 0.00000e+00
4 mMMC_t<tcut 4.76000e+02 fixed
EXTERNAL ERROR MATRIX. NDIM= 25 NPAR= 1 ERR DEF=1
7.898e+03
ERR MATRIX APPROXIMATE
fmin = -0.204024 fedm = 0 errdef = 1
npari = 1 nparx = 4 istat = 1
minimisation of variable ��5!�p�غ�5ZtautauL.root�<��o�%
0 0�
غ�5� complete
**********
** 6 **SCAN 3 1000 0 500
**********
1SCAN OF PARAMETER NO. 3, mBB_t<tcut
FCN=-0.204024 FROM SCAn STATUS= NO CHANGE 98 CALLS 141 TOTAL
EDM=0 STRATEGY= 1 ERROR MATRIX UNCERTAINTY 100.0 per cent
EXT PARAMETER APPROXIMATE INTERNAL INTERNAL
NO. NAME VALUE ERROR STEP SIZE VALUE
1 mBB_t>tcut 7.20000e+01 fixed
2 mMMC_t>tcut 9.80000e+01 fixed
3 mBB_t<tcut 1.41000e+02 2.27397e+02 0.00000e+00 -1.22422e+00
4 mMMC_t<tcut 4.76000e+02 fixed
Minuit Scan of variable mBB complete
PARAMETER DEFINITIONS:
NO. NAME VALUE STEP SIZE LIMITS
1 mBB_t>tcut 7.20000e+01 1.00000e-01 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 9.80000e+01 5.00000e-01 7.00000e+01 1.10000e+02
3 mBB_t<tcut 1.41000e+02 5.00000e-01 1.30000e+02 5.00000e+02
4 mMMC_t<tcut 4.76000e+02 5.00000e-01 1.10000e+02 5.00000e+02
**********
** 1 **FIX 1
**********
**********
** 2 **FIX 3
**********
**********
** 3 **FIX 4
**********
**********
** 4 **SIMPLEX 1000 0.1
**********
FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
START SIMPLEX MINIMIZATION. CONVERGENCE WHEN EDM .LT. 0.1
FCN=-0.358605 FROM SIMPLEX STATUS=PROGRESS 5 CALLS 6 TOTAL
EDM=0.154581 STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS PHYSICAL LIMITS
NO. NAME VALUE ERROR NEGATIVE POSITIVE
1 mBB_t>tcut 7.20000e+01 fixed 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 1.09954e+02 5.00000e-01 7.00000e+01 1.10000e+02
3 mBB_t<tcut 1.41000e+02 fixed 1.30000e+02 5.00000e+02
4 mMMC_t<tcut 4.76000e+02 fixed 1.10000e+02 5.00000e+02
SIMPLEX MINIMIZATION HAS CONVERGED.
FCN=-0.358605 FROM SIMPLEX STATUS=PROGRESS 10 CALLS 11 TOTAL
EDM=0.00577878 STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS PHYSICAL LIMITS
NO. NAME VALUE ERROR NEGATIVE POSITIVE
1 mBB_t>tcut 7.20000e+01 fixed 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 1.09954e+02 5.00000e-01 7.00000e+01 1.10000e+02
3 mBB_t<tcut 1.41000e+02 fixed 1.30000e+02 5.00000e+02
4 mMMC_t<tcut 4.76000e+02 fixed 1.10000e+02 5.00000e+02
**********
** 5 **MIGRAD 2e+04 0.1
**********
START MIGRAD MINIMIZATION. STRATEGY 1. CONVERGENCE WHEN EDM .LT. 1.00e-04
FCN=-0.358605 FROM MIGRAD STATUS=INITIATE 23 CALLS 34 TOTAL
EDM= unknown STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 fixed
2 mMMC_t>tcut 1.09954e+02 5.00000e-01 0.00000e+00 -3.18135e-02
3 mBB_t<tcut 1.41000e+02 fixed
4 mMMC_t<tcut 4.76000e+02 fixed
MIGRAD MINIMIZATION HAS CONVERGED.
MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
MINUIT WARNING IN HESSE
============== Second derivative enters zero, param 2
COVARIANCE MATRIX CALCULATED SUCCESSFULLY
FCN=-0.358998 FROM MIGRAD STATUS=CONVERGED 48 CALLS 59 TOTAL
EDM=2.39053e-06 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 fixed
2 mMMC_t>tcut 1.09998e+02 3.99707e+01 5.53558e-02 -7.09419e-04
3 mBB_t<tcut 1.41000e+02 fixed
4 mMMC_t<tcut 4.76000e+02 fixed
EXTERNAL ERROR MATRIX. NDIM= 25 NPAR= 1 ERR DEF=1
9.213e-01
fmin = -0.358998 fedm = 2.39053e-06 errdef = 1
npari = 1 nparx = 4 istat = 3
minimisation of variable mMMC complete
**********
** 6 **SCAN 2 1000 0 500
**********
1SCAN OF PARAMETER NO. 2, mMMC_t>tcut
FCN=-0.358998 FROM SCAn STATUS= NO CHANGE 98 CALLS 157 TOTAL
EDM=2.39053e-06 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 fixed
2 mMMC_t>tcut 1.09998e+02 3.99707e+01 5.53558e-02 -7.09419e-04
3 mBB_t<tcut 1.41000e+02 fixed
4 mMMC_t<tcut 4.76000e+02 fixed
Minuit Scan of variable mMMC complete
PARAMETER DEFINITIONS:
NO. NAME VALUE STEP SIZE LIMITS
1 mBB_t>tcut 7.20000e+01 1.00000e-01 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 9.80000e+01 5.00000e-01 7.00000e+01 1.10000e+02
3 mBB_t<tcut 1.41000e+02 5.00000e-01 1.30000e+02 5.00000e+02
4 mMMC_t<tcut 4.76000e+02 5.00000e-01 1.10000e+02 5.00000e+02
**********
** 1 **FIX 1
**********
**********
** 2 **FIX 2
**********
**********
** 3 **FIX 3
**********
**********
** 4 **SIMPLEX 1000 0.1
**********
FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
START SIMPLEX MINIMIZATION. CONVERGENCE WHEN EDM .LT. 0.1
FUNCTION VALUE DOES NOT SEEM TO DEPEND ON ANY OF THE 1 VARIABLE PARAMETERS.
VERIFY THAT STEP SIZES ARE BIG ENOUGH AND CHECK FCN LOGIC.
*******************************************************************************
*******************************************************************************
FCN=-0.204024 FROM SIMPLEX STATUS=PROGRESS 6 CALLS 7 TOTAL
EDM=0 STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS PHYSICAL LIMITS
NO. NAME VALUE ERROR NEGATIVE POSITIVE
1 mBB_t>tcut 7.20000e+01 fixed 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 9.80000e+01 fixed 7.00000e+01 1.10000e+02
3 mBB_t<tcut 1.41000e+02 fixed 1.30000e+02 5.00000e+02
4 mMMC_t<tcut 4.76000e+02 5.00000e-01 1.10000e+02 5.00000e+02
FUNCTION VALUE DOES NOT SEEM TO DEPEND ON ANY OF THE 1 VARIABLE PARAMETERS.
VERIFY THAT STEP SIZES ARE BIG ENOUGH AND CHECK FCN LOGIC.
*******************************************************************************
*******************************************************************************
FUNCTION VALUE DOES NOT SEEM TO DEPEND ON ANY OF THE 1 VARIABLE PARAMETERS.
VERIFY THAT STEP SIZES ARE BIG ENOUGH AND CHECK FCN LOGIC.
*******************************************************************************
*******************************************************************************
SIMPLEX MINIMIZATION HAS CONVERGED.
FCN=-0.204024 FROM SIMPLEX STATUS=PROGRESS 11 CALLS 12 TOTAL
EDM=0 STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS PHYSICAL LIMITS
NO. NAME VALUE ERROR NEGATIVE POSITIVE
1 mBB_t>tcut 7.20000e+01 fixed 3.00000e+01 1.00000e+02
2 mMMC_t>tcut 9.80000e+01 fixed 7.00000e+01 1.10000e+02
3 mBB_t<tcut 1.41000e+02 fixed 1.30000e+02 5.00000e+02
4 mMMC_t<tcut 4.76000e+02 5.00000e-01 1.10000e+02 5.00000e+02
**********
** 5 **MIGRAD 2e+04 0.1
**********
START MIGRAD MINIMIZATION. STRATEGY 1. CONVERGENCE WHEN EDM .LT. 1.00e-04
FCN=-0.204024 FROM MIGRAD STATUS=INITIATE 17 CALLS 29 TOTAL
EDM= unknown STRATEGY= 1 NO ERROR MATRIX
EXT PARAMETER CURRENT GUESS STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 fixed
2 mMMC_t>tcut 9.80000e+01 fixed
3 mBB_t<tcut 1.41000e+02 fixed
4 mMMC_t<tcut 4.76000e+02 5.00000e-01 0.00000e+00 0.00000e+00
MIGRAD MINIMIZATION HAS CONVERGED.
MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
MINUIT WARNING IN HESSE
============== Second derivative zero for parameter4
MNHESS FAILS AND WILL RETURN DIAGONAL MATRIX.
FCN=-0.204024 FROM HESSE STATUS=FAILED 7 CALLS 36 TOTAL
EDM=0 STRATEGY= 1 ERROR MATRIX UNCERTAINTY 100.0 per cent
EXT PARAMETER APPROXIMATE STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 fixed
2 mMMC_t>tcut 9.80000e+01 fixed
3 mBB_t<tcut 1.41000e+02 fixed
4 mMMC_t<tcut 4.76000e+02 3.13455e+02 0.00000e+00 0.00000e+00
MIGRAD MINIMIZATION HAS CONVERGED.
MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
MINUIT WARNING IN HESSE
============== Second derivative zero for parameter4
MNHESS FAILS AND WILL RETURN DIAGONAL MATRIX.
FCN=-0.204024 FROM MIGRAD STATUS=CONVERGED 31 CALLS 43 TOTAL
EDM=0 STRATEGY= 1 ERROR MATRIX UNCERTAINTY 100.0 per cent
EXT PARAMETER APPROXIMATE STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 mBB_t>tcut 7.20000e+01 fixed
2 mMMC_t>tcut 9.80000e+01 fixed
3 mBB_t<tcut 1.41000e+02 fixed
4 mMMC_t<tcut 4.76000e+02 3.13455e+02 0.00000e+00 0.00000e+00
EXTERNAL ERROR MATRIX. NDIM= 25 NPAR= 1 ERR DEF=1
1.757e+04
ERR MATRIX APPROXIMATE
fmin = -0.204024 fedm = 0 errdef = 1
npari = 1 nparx = 4 istat = 1
minimisation of variable ��5ZtautauL.root�<��o�%
0 0�
غ�5!�p�غ�5� complete
**********
** 6 **SCAN 4 1000 0 500
**********
1SCAN OF PARAMETER NO. 4, mMMC_t<tcut
FCN=-0.204024 FROM SCAn STATUS= NO CHANGE 98 CALLS 141 TOTAL
EDM=0 STRATEGY= 1 ERROR MATRIX UNCERTAINTY 100.0 per cent
EXT PARAMETER APPROXIMATE INTERNAL INTERNAL
NO. NAME VALUE ERROR STEP SIZE VALUE
1 mBB_t>tcut 7.20000e+01 fixed
2 mMMC_t>tcut 9.80000e+01 fixed
3 mBB_t<tcut 1.41000e+02 fixed
4 mMMC_t<tcut 4.76000e+02 3.13455e+02 0.00000e+00 1.06942e+00
Minuit Scan of variable mMMC complete
What is weird that is after the Minuit has done its thing, I have a line of code that says:
cout << "minimisation of variable " << varsName[cutVarIndex] << " complete" << endl << endl;
however it is outputting
minimisation of variable ��5ZtautauL.root�<��o�%
0 0�
غ�5!�p�غ�5� complete
Do you have any idea about this?
I don’t know enough about Minuit to help you with your puzzle. The only other thing I can think of is to set the fit strategy to robust instead of balanced or fast.
As to the variable names:
Hi Stephen,
There are no special characters etc. In fact “ZtautauL.root” is a filename not even passed to this function so I have no idea whats happening. The varsName declaration is
TString varsName[] = {"mBB", "mMMC","mHH", "drBB", "drLepTau", "mtLepMet"};
So I can’t see where the leak is.
I assume you read the array with variable names at position 6, i.e. past the end.
Do you compile the macro? Does it complain?
Do you have memory checkers such as valgrind?
Hi Stephan,
This is the code I am currently running. The array with the variable names is used to define the variables and is also declared inside the fitting function.
I am running it using “root -l -b -q -x Debugger2.C”.
Debugger2.C
You are missing: #include "TGraph.h"Form(...) with TString::Format(...).
system
August 16, 2019, 2:55pm
11
This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.
