cms-sw/cmssw — pull request #78 by fabiocos (2013-07-11 09:56:57+00:00)
Title: Update of PDF reweighting supporting MadGraph use case, use first PDF as...

Update of PDF reweighting supporting MadGraph use case, use first PDF as default/reference. The first PDF in the user supplied list will be used as the one wrt to which to compare weights. Useful for Madgraph when the original PDF information is not directly accessible in the event