Mig Simple Ana to Rivet4

Migration from SimpleAnalysis to Rivet v4.1

Use the following table for some first guidance on how to migrate your code from SimpleAnalysis to Rivet v4.1.

SimpleAnalysis	Rivet
`accept(region)`	`fill(region, value)`
`calcAMT2(fourMom1, fourMom2, met, invisiblesMass, target_mass)`	mT2(fourMom1, fourMom2, met, invisiblesMass, invisiblesMass2=-1)
`calcMT(fourMom1, fourMom2)`	`mT(fourMom1, fourMom2)`
`calcMTmin()`
`countObjects(objs, conds)`	`select(objs, conds).size()`
`d0`, `d0sigma`, `d0significance`	just ignore them for now!
`event->getElectrons()`	`electrons()`
`event->getJets()`	`jets()`
`event->getMET()`	`met()`
	`metSignf()`
`event->getMuons()`	`muons()`
`filterCrack(elecs)`	`select(elecs, Cuts::abseta<1.37 or Cuts::abseta>1.52)`
`filterJets(jets, conds)`	`select(jets, conds)`
`filterObjects(objs, conds)`	`select(objs, conds)`
`filterObjectsRange(objs, cond_low, cond_high)`	`select(objs, cond_low && cond_high)`
`minDphi(objs)`	`deltaPhiMin(objs)`
`minDR(objs)`	`deltaRMin(objs)`
`overlapRemoval(objs)`	`doSimpleOverlapRemoval()`
`obj.Eta()`	`obj.eta()`
`obj.Phi()`	`obj.phi()`
`obj.Pt()`	`obj.pT()`
`reclusterJets(jets, conds)`	`reclusterJets(jets, conds)`
`sortObjectsByMass(objs)`	`isort(objs, Kin::mass)`
`sortObjectsByPt(objs)`	`isortByPt(objs)`
`sumObjectsPt(objs, base_val)`	`sumPtVec(objs) + base_val`

Let us know if you require further advice (in general or to be added here)! In general, have a look at MathUtils.hh, ParticleBaseUtils.hh, and RivetMT2.hh for further inspiration of handy calculation shortcuts that Rivet provides!