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#ifndef MYTOOLS_HH
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#define MYTOOLS_HH
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#include <TGraphAsymmErrors.h>
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#include <TH1F.h>
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#include <iostream>
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//#include "RooStats/FeldmanCousins.h"
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namespace toolbox
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{
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//Double_t calcEff(const Int_t pass, const Int_t total, Double_t *errl=0, Double_t *errh=0, Int_t method=0);
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//Double_t calcEff(const Double_t pass, const Double_t total, Double_t *errl=0, Double_t *errh=0, Int_t method=0);
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Double_t deltaR(const Double_t eta1, const Double_t phi1, const Double_t eta2, const Double_t phi2);
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Double_t deltaPhi(const Double_t phi1, const Double_t phi2);
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Int_t roundToInt(const Double_t x);
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}
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/*
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//------------------------------------------------------------------------------------------------------------------------
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Double_t toolbox::calcEff(Int_t pass, Int_t total, Double_t *errl, Double_t *errh, Int_t method)
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{
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// method: 0 -> Bayes Divide
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// 1 -> Feldman-Cousins
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// 2 -> Clopper-Pearson
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Double_t r = (total>0) ? (Double_t)pass/(Double_t)total : 0;
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if(errl) *errl = 0;
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if(errh) *errh = 0;
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const Double_t conf = 0.68269;
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if(method==0) {
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TGraphAsymmErrors g;
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Double_t mode, low, high;
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g.Efficiency(pass,total,conf,mode,low,high);
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if(errl) *errl = mode - low;
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if(errh) *errh = high - mode;
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}
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if(method==1) {
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// FeldmanCousins fc;
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// fc.SetConfidenceLevel(conf);
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}
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if(method==2) {
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}
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return r;
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}
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Double_t toolbox::calcEff(Double_t pass, Double_t total, Double_t *errl, Double_t *errh, Int_t method)
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{
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// Round values to whole numbers first
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return calcEff(roundToInt(pass),roundToInt(total),errl,errh,method);
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}
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*/
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//------------------------------------------------------------------------------------------------------------------------
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Double_t toolbox::deltaR(Double_t eta1, Double_t phi1, Double_t eta2, Double_t phi2)
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{
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const Double_t pi = 3.14159265358979;
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Double_t dphi = fabs(phi1-phi2);
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while (dphi>pi)
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dphi = fabs(dphi - 2.0*pi);
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Double_t deta = eta1-eta2;
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return sqrt(dphi*dphi + deta*deta);
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}
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//------------------------------------------------------------------------------------------------------------------------
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Double_t toolbox::deltaPhi(Double_t phi1, Double_t phi2)
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{
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// Compute dPhi between two given angles. Results is in [0,pi].
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const Double_t pi = 3.14159265358979;
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Double_t dphi = fabs(phi1-phi2);
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while (dphi>pi)
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dphi = fabs(dphi - 2.0*pi);
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return dphi;
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}
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//------------------------------------------------------------------------------------------------------------------------
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Int_t toolbox::roundToInt(Double_t x)
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{
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if(x>0)
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return ((x-floor(x)) < (ceil(x)-x)) ? (Int_t)floor(x) : (Int_t)ceil(x);
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else
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return ((x-floor(x)) < (ceil(x)-x)) ? (Int_t)ceil(x) : (Int_t)floor(x);
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}
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#endif
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