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| limits:limits [2018/05/16 09:57] – [Other methods and options] iwn | limits:limits [2018/10/04 16:41] (current) – [Limits with the Higgs Combined Tool] iwn |
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| The **Combined Tool** by the [[https://twiki.cern.ch/twiki/bin/view/CMS/HiggsWG/HiggsCombination|Higgs Combination Group]] provides the ''combine'' command which runs different statistical methods with RooStats for some input, e.g. a text file (datacard) containing information on the systematic uncertainties, data and processes, [[limits:limits#Simple example: Running the combine tool|like the example below]]. It is extensively discussed here: | The **Combined Tool** by the [[https://twiki.cern.ch/twiki/bin/view/CMS/HiggsWG/HiggsCombination|Higgs Combination Group]] provides the ''combine'' command which runs different statistical methods with RooStats for some input, e.g. a text file (datacard) containing information on the systematic uncertainties, data and processes, [[limits:limits#Simple example: Running the combine tool|like the example below]]. It is extensively discussed here: |
| * https://twiki.cern.ch/twiki/bin/viewauth/CMS/SWGuideHiggsAnalysisCombinedLimit | * TWiki documentation: https://twiki.cern.ch/twiki/bin/viewauth/CMS/SWGuideHiggsAnalysisCombinedLimit |
| * https://cms-hcomb.gitbooks.io/combine/content/ | * GitBooks documentation: https://cms-hcomb.gitbooks.io/combine/content/ |
| | * Hypernews forum: https://hypernews.cern.ch/HyperNews/CMS/get/higgs-combination |
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| [[https://indico.cern.ch/event/577649/#day-2016-11-30|These]] are useful **tutorials** on the Combine Tool from a 2016 CERN workshop (slides plus video). It may be interesting to do the exercises on [[https://indico.cern.ch/event/577649/sessions/212214/attachments/1378209/2093750/combine_SWAN_instructions.pdf|SWAN]]. Otherwise, take a look at [[https://github.com/nucleosynthesis/HiggsAnalysis-CombinedLimit/blob/combine_tutorial_SWAN/combine_tutorials_2016/combine_intro/python_CombineIntro.ipynb|these examples on GitHub]]. | [[https://indico.cern.ch/event/577649/#day-2016-11-30|These]] are useful **tutorials** on the Combine Tool from a 2016 CERN workshop (slides plus video). It may be interesting to do the exercises on [[https://indico.cern.ch/event/577649/sessions/212214/attachments/1378209/2093750/combine_SWAN_instructions.pdf|SWAN]]. Otherwise, take a look at [[https://github.com/nucleosynthesis/HiggsAnalysis-CombinedLimit/blob/combine_tutorial_SWAN/combine_tutorials_2016/combine_intro/python_CombineIntro.ipynb|these examples on GitHub]]. |
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| | Many other **examples** can be found on [[https://twiki.cern.ch/twiki/bin/view/CMS/WorkBookExercisesCMSDataAnalysisSchool|this TWiki page for the CMSDAS school]]. |
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| Description of the statistical methods at CMS: | Description of the statistical methods at CMS: |
| ===== Brazilian plot ===== | ===== Brazilian plot ===== |
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| To make a Brazilian plot, you can make a simple python script that automatically creates the datacards for different values of some parameter like the invariant mass. [[limits:brazilianplotexample|This example]] shows scan for the background uncertainty. | To make a Brazilian plot, you can make a simple python script that automatically creates the datacards for different values of some parameter like the invariant mass. [[limits:brazilianplotexample|This example]] shows scan for the background uncertainty. Guidelines for a CMS-style limit plot can be found [[https://ghm.web.cern.ch/ghm/plots/|here]] and [[https://twiki.cern.ch/twiki/bin/view/CMS/Internal/FigGuidelines#Convention_for_Brazilian_flag_pl|here]]. |
| {{ limits:upperlimit_brazilianplot.png ? 400 }} | {{ limits:upperlimit_brazilianplot.png ? 400 }} |
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| ===== Other ===== | ===== Other ===== |
