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joshmt |
1.1 |
/*
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a place for very simple functions that don't depend on anything else
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can be easily #included into other code
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*/
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#include "TString.h"
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joshmt |
1.3 |
#include <iostream>
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joshmt |
1.1 |
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namespace jmt {
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//======misc utilities======
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//gets rid of = > < from cuts in order to be better included in file names
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TString fortranize(TString cut) {
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cut.ReplaceAll("==","eq");
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cut.ReplaceAll(">=","gte");
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cut.ReplaceAll("<=","lte");
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cut.ReplaceAll(">","gt");
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cut.ReplaceAll("<","lt");
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return cut;
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}
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joshmt |
1.3 |
void weightedMean(Int_t n, Double_t *a, Double_t *e) {
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Double_t numerator=0;
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Double_t denominator=0;
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for (Int_t i=0; i<n; ++i) {
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Double_t esq = e[i]*e[i];
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if (esq == 0) {cout<<"Error is zero!"<<endl; return;}
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numerator += a[i] / esq;
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denominator += 1.0 / esq;
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}
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cout<<"mean = "<<numerator / denominator<<" +/- "<<sqrt(1/denominator)<<endl;
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}
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//implemented in TMath in later versions of root, so i'm using the TMath name
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bool AreEqualAbs( const double & a, const double & b, const double epsilon=0.001) {
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return ( fabs(a-b) < epsilon ) ;
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}
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// == error propagation ==
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//because not all versions of ROOT have it built in
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double errOnIntegral(const TH1D* h, int binlow=1, int binhigh=-1) {
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if (binhigh == -1) binhigh = h->GetNbinsX();
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double err=0;
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for (int i = binlow; i<= binhigh; i++) {
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err += h->GetBinError(i) * h->GetBinError(i);
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}
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if (err<0) return err;
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return sqrt(err);
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}
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//return error on a/b
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double errAoverB(double a, double aerr, double b, double berr) {
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if (b==0 || a==0) {
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cout<<"Warning in errAoverB -- a or b is zero!"<<endl;
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return -1;
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}
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return (a/b)*sqrt( pow( aerr/a, 2) + pow( berr/b, 2) );
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}
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//return error on a*b
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double errAtimesB(double a, double aerr, double b, double berr) {
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if (b==0 || a==0) {
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cout<<"Warning in errAtimesB -- a or b is zero!"<<endl;
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return -1;
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}
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return a*b*sqrt( pow( aerr/a, 2) + pow( berr/b, 2) );
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}
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joshmt |
1.2 |
//======== container for run, lumisection, event number =========
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class eventID {
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public:
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eventID();
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eventID(ULong64_t RunNumber, ULong64_t LumiSection, ULong64_t EventNumber);
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~eventID();
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bool operator< (const eventID & id) const;
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bool operator== (const eventID & id) const;
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bool operator!= (const eventID & id) const;
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ULong64_t run;
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ULong64_t ls;
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ULong64_t ev;
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};
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eventID::eventID() : run(0),ls(0),ev(0) {}
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eventID::eventID(ULong64_t RunNumber, ULong64_t LumiSection, ULong64_t EventNumber) :
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run(RunNumber),ls(LumiSection),ev(EventNumber) {}
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eventID::~eventID() {}
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bool eventID::operator== (const eventID & id) const {
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if (ev == id.ev &&
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ls == id.ls &&
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run == id.run) return true;
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return false;
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}
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bool eventID::operator!= (const eventID & id) const {
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return !(*this == id);
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}
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bool eventID::operator< (const eventID & id) const {
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if (run < id.run) return true;
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else if (run > id.run) return false;
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else { //if run is equal
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//now compare lumi section
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if ( ls < id.ls ) return true;
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else if (ls > id.ls) return false;
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else { //if ls is equal
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if ( ev < id.ev ) return true;
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else if (ev > id.ev) return false;
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else { //these are the same event!
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return false;
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}
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}
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}
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//this shouldn't happen
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assert(0);
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return false;
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}
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} //end of namespace
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