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limits:limits [2018/02/01 12:07] – [Limits with the Higgs Combined Tool] iwnlimits:limits [2018/05/16 09:57] – [Other methods and options] iwn
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  ===== Quick setup =====  ===== Quick setup =====
  
-Get **CMSSW** for the Combined Tool:+Latest instructions to get ''combine'' can be found [[https://cms-hcomb.gitbooks.io/combine/content/part1/#for-end-users-that-dont-need-to-commit-or-do-any-development|in the manual]] and [[https://twiki.cern.ch/twiki/bin/viewauth/CMS/SWGuideHiggsAnalysisCombinedLimit#ROOT606_SLC6_CMSSW_8_1_X|on the TWiki]]. In summary: Get **CMSSW** for the Combined Tool:
  
 <code bash> <code bash>
-export SCRAM_ARCH=slc6_amd64_gcc491 +export SCRAM_ARCH=slc6_amd64_gcc530 
-cmsrel CMSSW_7_4_7 +cmsrel CMSSW_8_1_0 
-cd CMSSW_7_4_7/src +cd CMSSW_8_1_0/src 
 cmsenv cmsenv
 </code> </code>
  
-Get **Combined Tool**:+(''combine'' in ''CMSSW_7_4_7'' is outdated.) Get **Combined Tool**:
  
 <code bash> <code bash>
 git clone https://github.com/cms-analysis/HiggsAnalysis-CombinedLimit.git HiggsAnalysis/CombinedLimit git clone https://github.com/cms-analysis/HiggsAnalysis-CombinedLimit.git HiggsAnalysis/CombinedLimit
 cd HiggsAnalysis/CombinedLimit cd HiggsAnalysis/CombinedLimit
 +git fetch origin
 +git checkout v7.0.8
 +scramv1 b clean; scramv1 b
 </code> </code>
  
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 <code bash> <code bash>
-source /afs/cern.ch/cms/cmsset_default.sh +source $VO_CMS_SW_DIR/cmsset_default.sh 
-export SCRAM_ARCH=slc6_amd64_gcc491 +export SCRAM_ARCH=slc6_amd64_gcc530 
-cd ~/phase2/CMSSW_7_4_7/src/ +cd ~/phase2/CMSSW_8_0_1/src/ 
-eval `scram runtime -sh`+cmsenv
 </code> </code>
- 
- 
  ===== Simple example: Running the combine tool =====  ===== Simple example: Running the combine tool =====
  
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 The combine tool has many more [[https://twiki.cern.ch/twiki/bin/viewauth/CMS/SWGuideHiggsAnalysisCombinedLimit#How_to_run_the_tool|methods]] and options (type ''%%combine --help%%''). The combine tool has many more [[https://twiki.cern.ch/twiki/bin/viewauth/CMS/SWGuideHiggsAnalysisCombinedLimit#How_to_run_the_tool|methods]] and options (type ''%%combine --help%%'').
-If you are interested in the **expected significance**, use ''[[https://twiki.cern.ch/twiki/bin/viewauth/CMS/SWGuideHiggsAnalysisCombinedLimit#Maximum_likelihood_fits_and_diag|MaxLikelihoodFit]]''. This can method also can be used to extract the **observed cross section**.+If you are interested in the **expected significance**, use ''[[https://twiki.cern.ch/twiki/bin/viewauth/CMS/SWGuideHiggsAnalysisCombinedLimit#Maximum_likelihood_fits_and_diag|MaxLikelihoodFit]]'' (''FitDiagnositcs'' in ''CMSSW_8_1_0''). This can method also can be used to extract the **observed cross section**.
 If you are interested in only an //approximation// of the **expected number of signal events** (**yield**) with the maximum likelihood fit, use ''[[https://twiki.cern.ch/twiki/bin/viewauth/CMS/SWGuideHiggsAnalysisCombinedLimit#Computing_the_observed_limit_wit|ProfileLikelihood]]''. For the **upper limits** however, you always should use ''Asymptotic'' instead. If you are interested in only an //approximation// of the **expected number of signal events** (**yield**) with the maximum likelihood fit, use ''[[https://twiki.cern.ch/twiki/bin/viewauth/CMS/SWGuideHiggsAnalysisCombinedLimit#Computing_the_observed_limit_wit|ProfileLikelihood]]''. For the **upper limits** however, you always should use ''Asymptotic'' instead.
  
limits/limits.txt · Last modified: 2018/10/04 16:41 by iwn

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