Difference: AtlasDataAnalysis (99 vs. 100)

Revision 1002011-08-16 - AlistairGemmell

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Computentp, Neural Nets and MCLIMITS

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Filters

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It is possible for the inputs to the ANN to have more events in than those that you want to pass to on for processing. We only want to train the ANN on those samples that would pass our preselection cuts - general cleaning cuts and the like. (There was a previous version of our inputs where we also required 'sensible states' - for each candidate event we required it to reconstruct tops and Ws with vaguely realistic masses. However - this is a Neural Net analysis, so it has been decided to remove these cuts - they will after all in effect be reintroduced by the net itself if they would have been useful, and by not applying them ourselves, we are passing more information to the net.) We therefore have filters so that Computentp and the ANN only look at events of our choosing. These filters take the place of various bitwise tests in genemflat_batch_Complete2.sh (not currently used, as explained below) and TreeSpecATLAStth.txt.
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It is possible for the inputs to the ANN to have more events in than those that you want to pass to on for processing. We only want to train the ANN on those samples that would pass our preselection cuts - general cleaning cuts and the like. (There was a previous version of our inputs where we also required 'sensible states' - for each candidate event we required it to reconstruct tops and Ws with vaguely realistic masses. However - this is a Neural Net analysis, so it has been decided to remove these cuts - they will after all in effect be reintroduced by the net itself if they would have been useful, and by not applying them ourselves, we are passing more information to the net.) We therefore have filters so that Computentp and the ANN only look at events of our choosing. These filters take the place of various bitwise tests in TMVAsteer.txt (created in genemflat_batch_Complete2.sh) (not currently used, as explained below) and TreeSpecATLAStth.txt.
  In TreeSpecATLAStth.txt the filters control what is used for the templating, and Computentp:
 
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