computils.h

Go to the documentation of this file.

/* emacs: this is -*- c++ -*- */
 
// cppcheck-suppress-file stlIfStrFind; cannot use later than C++17 for this code
 
#ifndef COMPUTILS_H
#define COMPUTILS_H
 
#include <iostream>
#include <string>
#include <vector>
#include <cstdio>
#include <cstdlib>
#include <exception>
 
#include "label.h"
#include "utils.h"
#include "DrawLabel.h" 
 
#include "TStyle.h"
#include "TPad.h"
#include "TH1D.h"
#include "TFile.h"
#include "TH1.h"
#include "TF1.h"
#include "TGraphAsymmErrors.h"
 
#include "TLegend.h"
 
// #define JL
 
extern bool JLflag;
 
extern bool LINEF;
extern bool LINES;
 
 
void band_plot( TH1* h, double xlo, double xhi, double ylo=-999, double yhi=-999 );
 
void ATLASFORAPP_LABEL( double x, double y, int color, double size=0.06 ); 
 
void myText( Double_t x, Double_t y, Color_t color, const std::string& text, Double_t tsize);
 

std::string stime();
static std::string release;
 
double integral( TH1* h );
 
void Norm( TH1* h, double scale=1, double xmin=0, double xmax=0 );
 
double Entries( TH1* h );

bool contains( const std::string& s, const std::string& p);
bool contains( const std::string& s, char p) noexcept;

bool fcontains( const std::string& s, const std::string& p);

bool exists( const std::string& filename );

std::string tail( std::string s, const std::string& pattern );

std::string head( std::string s, const std::string& pattern );

std::string globbed( const std::string& s );
 
void contents( std::vector<std::string>& keys, 
           TDirectory* td, 
           const std::string& directory="", 
           const std::string& pattern="", 
           const std::string& path="" );
 
void contents( std::vector<std::string>& keys, 
           TDirectory* td, 
           const std::string& directory="", 
           const std::vector<std::string>& patterns=std::vector<std::string>(), 
           const std::string& path="" );
 
 
double realmax( TH1* h, bool include_error=true, double lo=0, double hi=0 );
double realmin( TH1* h, bool include_error=true, double lo=0, double hi=0 );
 
std::string findcell( std::string name, const std::string& regex, const std::string& splitex="/" );
 
std::string findrun( TFile *f );
 
double plotable( TH1* h ); // , double xlo=-999, double xhi=-999 );
 
 
class data_mismatch : public std::exception { 
public:
  data_mismatch(const std::string& s) { std::cerr << "exception:" << data_mismatch::what() << " " << s << std::endl; }; 
  virtual const char* what() const throw() { return "data don't match"; }
};
 
 
 
template<typename T>
std::ostream& operator<<( std::ostream& s, std::vector<T>& v) { 
  for ( unsigned i=0 ; i<v.size() ; i++ ) s << "\t" << v[i];
  return s;
}
 

std::vector<int>    findxrange(TH1* h, bool symmetric=false );
std::vector<double> findxrangeuser(TH1* h, bool symmetric=false );
 
 
 
void trim_tgraph( TH1* h, TGraphAsymmErrors* t );  
 
 
void xrange(TH1* h, bool symmetric=true );

void copyReleaseInfo( TFile* finput, TFile* foutdir );
 
 
class true_mean { 
 
public: 
  
  true_mean( TH1F* h );
 
  double mean() const  { return m_mean; } 
  double error() const { return m_error; } 
 
private:
  
  double m_mean;
  double m_error;
  
};
 

 
class AxisInfo { 
 
public:
 
  AxisInfo() = default; 
 
  AxisInfo(const AxisInfo& a ) = default; 
 
  AxisInfo& operator=(const AxisInfo& a ) = default; 
 
  AxisInfo( const std::string& s ) : 
    m_info(s), 
    m_log(false),
    m_autoset(false),
    m_symmetric(false),
    m_rangeset(false),
    m_lo(0),
    m_hi(0),
    m_norm(false),
    m_refnorm(false),
    m_binwidth(false),
    m_offset(0),
    m_trim(false)
  { 
    //    std::cout << "AxisInfo::info" << m_info << std::endl;
 
    std::vector<std::string> keys = split( s, ":" );
    
    //    std::cout << "\n\n" << s << "\nnkeys " << keys.size() << std::endl; 
 
    if ( keys.size()>0 ) m_tag = keys[0];
    
    bool minset = false;
    //  bool maxset = false;
    
    for ( size_t i=1 ; i<keys.size() ; i++ ) { 
      
      if       ( keys[i]=="lin" )   m_log       = false;
      else if  ( keys[i]=="log" )   m_log       = true;
      else if  ( keys[i]=="sym" )   m_symmetric = true; 
      else if  ( keys[i]=="norm" )  m_norm      = true;
      else if  ( keys[i]=="refn" )  m_refnorm   = true;
      else if  ( keys[i]=="width" ) m_binwidth  = true;
      else if  ( keys[i]=="auto" )  m_autoset   = true;
      else if  ( keys[i]=="trim" )  m_trim      = true;
      //cppcheck-suppress stlIfStrFind
      else if  ( keys[i].find("offset")==0  )  { 
 
    std::cout << "offset:" << std::endl;
    std::cout << "\tkey: " << keys[i] << std::endl;
    std::cout << "\tpos: " << keys[i].find("offset") << std::endl;
 
    std::string offset = keys[i];
    m_offset=std::atof(offset.substr(6,offset.size()-6).c_str());
 
    std::cout << "m_offset: " << m_offset << std::endl;
      }
      else if  ( keys[i]=="auton" )  {
    m_autoset = true;
    m_norm    = true;
      }
      else if  ( keys[i]=="autow" )  {
    m_autoset  = true;
    m_binwidth = true;
      }
      else if  ( keys[i]=="autown" || keys[i]=="autonw" ) {
    m_autoset  = true;
    m_norm     = true;
    m_binwidth = true;
      }
      else if  ( keys[i]=="autosym" ) { 
    m_autoset = true; 
    m_symmetric = true; 
      }
      else if  ( keys[i]=="normw" ||  keys[i]=="widthn" )  {
    m_norm     = true;
    m_binwidth = true;
      }
      else if  ( !minset )  { 
    m_lo = std::atof(keys[i].c_str());
    i++;
    if ( i<keys.size() ) m_hi = std::atof(keys[i].c_str());
    else {
      std::cerr << "not enough values for the axis range: " << s << std::endl;
      std::exit(-1);
    }
    minset = true;
    // maxset = true;
    m_rangeset = true;
      }
    }
        
#if 0
    std::cout << "AxisInfo::info" << m_info << "\n";
    std::cout << "\tlog   " << m_log       << "\n";
    std::cout << "\tauto  " << m_autoset   << "\n";
    std::cout << "\tsym   " << m_symmetric << "\n";
    std::cout << "\trange " << m_rangeset << " : " << m_lo << " - " << m_hi << std::endl;
#endif
 
  }
  
 
  const std::string& tag() const { return m_tag; }
 
  bool   log()  const { return m_log; }
 
  bool   autoset() const { return m_autoset; }
 
  bool   normset()    const { return m_norm; }
 
  bool   refnormset() const { return m_refnorm; }
  
  bool   symmetric() const { return m_symmetric; }
 
  bool   rangeset() const { return m_rangeset; }
 
  bool   trim() const { return m_trim; }
 
 
  double offset() const { return m_offset; }
 
 
  double lo() const { return m_lo; } 
  double hi() const { return m_hi; } 
 
  double lo(double x) { return m_lo=x; } 
  double hi(double x) { return m_hi=x; } 
 
  
  double binwidth() const { return m_binwidth; }
 
  const std::string& c_str() const { return m_info; }
 
public:
 
  static std::vector<std::string> split( const std::string& s, const std::string& t=":"  ) {
    
    std::string sc = s;
    size_t pos = sc.find(t);
    
    std::vector<std::string> tags;
    
    while ( pos!=std::string::npos ) { 
      tags.push_back( chop(sc,t) );
      pos = sc.find(t);
    }
    
    tags.push_back(sc);
    
    return tags;
  } 
  
 
public:
 
  std::string m_info;
  
  std::string m_tag;
 
  bool   m_log       = false;
  bool   m_autoset   = false;
  bool   m_symmetric = false;
 
  bool   m_rangeset  = false;
  double m_lo = 0; 
  double m_hi = 0;
 
  bool   m_norm     = false;
  bool   m_refnorm  = false;
  
  bool   m_binwidth = false;
  
  double m_offset = 0;
 
  bool   m_trim   = false;
 
};
 
 
inline std::ostream& operator<<( std::ostream& s, const AxisInfo& a ) { 
  s << "[ " << a.tag() << ( a.log() ? " : log" : "" ) << " ";
  if      (  a.autoset() ) s << " : auto";
  else if ( a.rangeset() ) s << " : range " << a.lo() << " - " << a.hi();
  s << " ]";
  return s; 
}
 
 
 
 
 
 

class Legend { 
 
public:
 
  Legend() : m_leg(nullptr){ 
    m_x[0]=0.0;
    m_y[0]=0.0;
    m_x[1]=0.0;
    m_y[1]=0.0;
      } 
 
  Legend(double x1, double x2, double y1, double y2): m_leg(nullptr) { 
    m_x[0]=x1;
    m_y[0]=y1;
    m_x[1]=x2;
    m_y[1]=y2;
  }
 
 
  // Legend( const Legend& leg ) : mleg((TLegend*)leg.mleg->Clone()) { } 
 
 Legend(const Legend& legend) : m_leg(legend.m_leg), 
   m_x{legend.m_x[0], legend.m_x[1]}, 
   m_y{legend.m_y[0], legend.m_y[1]} { } 
 
  ~Legend() { } 
 
  TLegend* legend() { return m_leg; } 
 
  size_t size() const { 
    return m_entries.size();
  }  
 
  double TextSize() const { return m_leg->GetTextSize(); }
 
  int TextFont() const { return m_leg->GetTextFont(); }
 
  double height() const { return m_y[1]-m_y[0]; }
 
  double width() const { return m_x[1]-m_x[0]; }
 
  void AddEntry( TObject* tobj, const std::string& s, const std::string& type="p" ) { 
    m_obj.push_back( tobj );
    m_entries.push_back( s );
    m_type.push_back( type );
  }
 
  void Draw() { 
    
 
    double y0 = 0;
 
    if ( m_y[0]>0.5 ) { 
      y0 = m_y[1] - m_entries.size()*0.05;
    }
    else { 
      y0 = m_y[0];
      m_y[1] = y0 + m_entries.size()*0.05;
    }
      
    m_leg = new TLegend( m_x[0], y0, m_x[1], m_y[1] );
 
#if 1
    m_leg->SetBorderSize(0);
    m_leg->SetTextFont(42);
    m_leg->SetTextSize(0.04);
    m_leg->SetFillStyle(3000);
    m_leg->SetFillColor(0);
    m_leg->SetLineColor(0);
#endif
    
    for ( size_t i=0 ; i<m_entries.size() ; i++ ) { 
      m_leg->AddEntry( m_obj[i], m_entries[i].c_str(), m_type[i].c_str() );
    }
 
    m_leg->Draw();
  }
 
 
private:
 
  TLegend* m_leg;
 
  double m_x[2];
  double m_y[2];
 
  std::vector<TObject*>    m_obj;
  std::vector<std::string> m_entries;
  std::vector<std::string> m_type;
 
}; 
 
 
extern int   colours[6]; // = {  1,  2, kBlue-4,  6, kCyan-2,  kMagenta+2 };
extern int   markers[6]; // = { 20, 24,      25, 26,      25,          22 };
extern double msizes[6]; // = {  1,  1,       1,  1,       1,            1 };
 
 
template<typename T>
void setParameters( T* h, TGraphAsymmErrors* tg ) { 
  tg->SetLineColor( h->GetLineColor() );
  tg->SetMarkerColor( h->GetMarkerColor() );
  tg->SetMarkerStyle( h->GetMarkerStyle() );
  tg->SetMarkerSize( h->GetMarkerSize() );
  tg->SetLineWidth( h->GetLineWidth() );
  tg->SetLineStyle( h->GetLineStyle() );
}
 
 
template<typename T>
void zeroErrors( T* /* h */ ) {
  // for ( int i=1 ; i<=h->GetNbinsX() ; i++ ) h->SetBinError( i, 1e-100 ); 
} 
 
 

template<typename T>
class tPlotter { 
 
public: 
  
  tPlotter(T* fo_htest=0, T* fo_href=0, const std::string& s="", TGraphAsymmErrors* fo_tgtest=0, TGraphAsymmErrors* fo_tgref=0 ) : 
    m_htest(fo_htest), m_href(fo_href),
    m_tgtest(fo_tgtest), m_tgref(fo_tgref),
    m_plotfilename(s),
    m_max_entries(4),
    m_entries(0), 
    m_trim_errors(false),
    m_mc(false), 
    m_lo(-999),  m_hi(-999),
    m_xlo(-999), m_xhi(-999),
    m_xaxis(0),  m_yaxis(0) {
  }
 
  
  tPlotter(const tPlotter& p) : 
    m_htest(p.m_htest),   m_href(p.m_href), 
    m_tgtest(p.m_tgtest), m_tgref(p.m_tgref), 
    m_plotfilename(p.m_plotfilename),
    m_max_entries(p.m_max_entries),
    m_entries(0),
    m_trim_errors(p.m_trim_errors),
    m_mc(p.m_mc),
    m_lo(p.m_lo), m_hi(p.m_hi),
    m_xlo(-999),  m_xhi(-999),
    m_xaxis(0),   m_yaxis(0) {
  }

  // ~tPlotter() { if ( m_tg ) delete m_tg; }
  ~tPlotter() { } 
 
 
  void xlo( double x ) { m_xlo = x; } 
  void xhi( double x ) { m_xhi = x; } 
 
  double xlo() const { return m_xlo; } 
  double xhi() const { return m_xhi; } 
  
  const std::string& plotfilename() const { return m_plotfilename; }
 
  void trim_errors(bool b) { m_trim_errors=b; } 
  
  bool  trim_errors() const { return m_trim_errors; } 
  
  void SetRange( double lo, double hi ) { m_lo=lo, m_hi=hi; }
 
  void Draw( int i, Legend* lleg, bool mean=false, bool first=true, bool drawlegend=false ) { 
 
    std::cout << "Draw " << __LINE__ << std::endl; 
 
    double phibeam = 0;
    double xbeam   = 0;
    double ybeam   = 0;
    double offbeam = 0;
 
    
    if ( htest() ) {
      
      gStyle->SetOptStat(0);
 
#if 1      
      if ( first ) { 
 
    // double lo = xlo();
    // double hi = xhi();
 
    double lo = htest()->GetBinLowEdge(1);
    double hi = htest()->GetBinLowEdge(htest()->GetNbinsX()+1);  
 
    std::cout << "aes lo:   " << lo << std::endl;
    std::cout << "ase hi:   " << hi << std::endl;
    
    std::cout << "ase m_lo: " << m_lo << std::endl;
    std::cout << "ase m_hi: " << m_hi << std::endl;
 
 
    if ( m_xaxis ) {
      std::cout << "xaxis:     " << *m_xaxis << std::endl;
      std::cout << "xaxis: lo; " <<  m_xaxis->m_lo << std::endl;
      std::cout << "xaxis: hi: " <<  m_xaxis->m_hi << std::endl;
      
      if ( m_xaxis->m_lo!=0 || m_xaxis->m_hi!=0 ) {
        // hnull->GetXaxis()->SetRangeUser( m_xaxis->m_lo, m_xaxis->m_hi!=0 );
 
        //      if ( lo>m_xaxis->m_lo ) lo = m_xaxis->m_lo;
        //      if ( hi<m_xaxis->m_hi ) hi = m_xaxis->m_hi;
 
        lo = m_xaxis->m_lo;
        hi = m_xaxis->m_hi;
      }
      else {
        if ( m_lo!=m_hi )  {
          if ( m_lo>lo ) lo = m_lo;
          if ( m_hi<hi ) hi = m_hi;
        }
      }
    }
 
    
    std::cout << "hist lo: " << lo << std::endl;
    std::cout << "hist hi: " << hi << std::endl;
 
    TH1D* hnull = new TH1D("hnull", htest()->GetTitle(), 100, lo, hi );  // htest()->GetBinLowEdge(1),  htest()->GetBinLowEdge(htest()->GetNbinsX()+1) );  
    hnull->SetDirectory(0);
    
    hnull->SetMaximum(htest()->GetMaximum());
    hnull->SetMinimum(htest()->GetMinimum());
    hnull->GetXaxis()->SetMoreLogLabels(true);
 
    hnull->GetXaxis()->SetTitle(htest()->GetXaxis()->GetTitle());
    hnull->GetYaxis()->SetTitle(htest()->GetYaxis()->GetTitle());
 
    for ( int ib=1 ; ib<101 ; ib++ ) hnull->SetBinContent(ib, hnull->GetMinimum()-1e10);
    
    hnull->DrawCopy();
 
    std::cout << htest()->GetTitle() << std::endl;
    std::cout << hnull->GetXaxis()->GetTitle() << std::endl;
    std::cout << hnull->GetYaxis()->GetTitle() << std::endl;
 
    first = false;
      }
#endif
      
      if ( href() ) { 
    href()->SetLineColor(colours[i%6]);
    href()->SetLineStyle(2);
    href()->SetMarkerStyle(0);
      }
      
      if ( LINEF ) htest()->SetLineColor(colours[i%6]);
 
      if ( JLflag ) { 
    if ( contains( std::string(htest()->GetName()), "vs_mu") ) htest()->GetXaxis()->SetRangeUser( 18, 58 );
    if ( contains( std::string(htest()->GetName()), "a0_eff") ) htest()->GetXaxis()->SetRangeUser( -200, 200 );
 
    std::cout << "TEST: " << htest()->GetName() << "   " << mc() << "\t" << std::endl;
      }
 
      htest()->SetLineStyle(1);
 
      if ( LINEF ) htest()->SetMarkerColor(htest()->GetLineColor());
 
      if ( LINEF ) htest()->SetMarkerStyle(markers[i%6]);
      // if ( LINEF && htest()->GetMarkerStyle() == 20 ) 
 
      if ( LINEF ) htest()->SetMarkerSize( msizes[i%6]*htest()->GetMarkerSize() );
 
      if ( htest() ) std::cout << "\tentries: " << plotable( htest() );
 
      std::cout << std::endl;
 
 
      if ( first )  {
 
    if ( !mc() ) { 
      if ( tgtest() ) { 
 
#if 0      
        TH1F* h = (TH1F*)htest()->Clone("h"); h->SetDirectory(0);
 
        zeroErrors(h);
        h->GetXaxis()->SetMoreLogLabels(true);
        if ( trim_errors() ) trim_tgraph( h, tgtest() );
 
        if ( m_xlo!=-999 && m_xhi!=-999 ) { 
          TH1D* hnull = nrew TH1D( "hnull", "", 100, m_xlo, m_xhi );
          hnull->SetMinimum( h->GetMinimum() );
          hnull->SetMaximum( h->GetMaximum() );
          hnull->SetTitle( h->GetTitle() );
          hnull->DrawCopy();
          h->Draw("ep same");
        }
        else {
          h->Draw("ep");
          first = false;
        }
 
        if ( LINES ) h->Draw("lhistsame");
        setParameters( h, tgtest() );
        tgtest()->Draw("esame");
#else
        zeroErrors(htest());
 
        std::cout << "shte lo: " << m_lo << std::endl;
        std::cout << "shte hi: " << m_hi << std::endl;
 
        
        htest()->GetXaxis()->SetMoreLogLabels(true);
        if ( trim_errors() ) trim_tgraph( htest(), tgtest() );
 
 
        htest()->Draw("ep");
        if ( LINES ) htest()->Draw("lhistsame");
        setParameters( htest(), tgtest() );
        tgtest()->Draw("esame");
        first = false;
 
 
#endif
      }
      else {
        
        std::cout << "cck lo: " << m_lo << std::endl;
        std::cout << "cck hi: " << m_hi << std::endl;
        
        htest()->GetXaxis()->SetMoreLogLabels(true);
        htest()->Draw("ep");
        first = false;
        if ( LINES ) htest()->Draw("lhistsame");
      }
    }
       
      }
 
      if ( s_plotref && href() ) {
    if ( contains(href()->GetName(),"_vs_")  || 
         contains(href()->GetName(),"sigma") || 
         contains(href()->GetName(),"mean") || 
         contains(href()->GetName(),"_eff")  ||
         contains(href()->GetName(),"Res_") || 
         contains(href()->GetName(),"Eff_") ) href()->Draw("hist same][");
    else                                      href()->Draw("hist same");
      }
 
      if ( !mc() && tgtest() ) { 
    zeroErrors(htest());
 
    if ( trim_errors() ) trim_tgraph( htest(), tgtest() );
    setParameters( htest(), tgtest() );
    tgtest()->Draw("e1same");
    if ( LINES ) tgtest()->Draw("lsame");
    
      }
      
#if 0
      if ( htest()->GetMarkerStyle()>23 ) { 
    TH1D* hnull = (TH1D*)htest()->Clone("duff"); hnull->SetDirectory(0);
    zeroErrors( hnull );
    hnull->SetLineColor(kWhite);
    hnull->SetMarkerStyle( htest()->GetMarkerStyle()-4 );
    //  hnull->SetMarkerStyle( 0 ); 
    hnull->SetMarkerColor(kWhite);
    hnull->SetMarkerSize( htest()->GetMarkerSize()*0.75 );
    // hnull->SetMarkerSize( 0 );
    hnull->DrawCopy("l same");
 
    std::cout << "cnt lo: " << m_lo << std::endl;
    std::cout << "cnt hi: " << m_hi << std::endl;
 
    
    delete hnull;
      }
#endif
 
      std::cout << "TEST MC: " << htest()->GetName() << " " << mc() << std::endl;  
 
      TH1* h = htest();
      
      TList* ccklist = h->GetListOfFunctions();
      
      size_t tlsize = ccklist->GetSize();
      
      std::cout << "tlsize: " << tlsize << std::endl; 
 
      
      for ( size_t icck=0 ; icck<tlsize ; icck++ ) {  
    std::cout << "tlist: " << icck << "  " << ccklist->At(icck)->GetName() << std::endl;
 
    TF1* cck = (TF1*)ccklist->At(icck);
 
    cck->SetLineColor(htest()->GetLineColor());
    
    if ( std::string(cck->GetName()) == "sinus" ) {
      phibeam = cck->GetParameter(1);
      xbeam   = cck->GetParameter(0)*cos(phibeam);
      ybeam   = cck->GetParameter(0)*sin(phibeam);
      offbeam = cck->GetParameter(2);
 
      std::cout << "phi = " << phibeam
            << "\nx   = " << xbeam
            << " mm\ny   = " << ybeam
            << " mm\noff = " << offbeam << " mm" << std::endl;  
      
    }
    
      }
      
      //      if ( tlsize > 0 ) std::exit(0);
 
 
      if ( !mc() ) { 
    
    std::cout << "TEST mtype " << htest()->GetMarkerStyle() << "  " <<  htest()->GetMarkerColor() << std::endl;
 
    if ( contains( std::string(h->GetName()), "a0_eff") ) {
      // h->GetXaxis()->SetRangeUser( -200,200 );
      
      std::cout << "STUFF" << std::endl; 
 
       
      for (int i=0 ; i<h->GetNbinsX() ; i++ ) {
        if (h->GetBinCenter(i)<-200 ) {
          h->SetBinContent(i,0);
          h->SetBinError(i,0);
        }
      }
    }
 
    htest()->Draw("ep same");
    if ( LINES ) htest()->Draw("lhist same");
      }
      else {
 
#if 1 
    std::cout << "colour: " << htest()->GetMarkerColor() << std::endl; 
 
#if 1
    htest()->SetFillStyle(455);
    htest()->SetFillColor(htest()->GetMarkerColor());
    htest()->SetMarkerStyle(0);
#endif
    
    if ( contains( std::string(h->GetName()), "vs_mu") ) h->GetXaxis()->SetRangeUser( 18, 58 );
    if ( contains( std::string(h->GetName()), "a0_eff") ) {
      h->GetXaxis()->SetRangeUser( -200,200 );
 
      std::cout << "STUFF" << std::endl; 
 
      for (int i=0 ; i<h->GetNbinsX() ; i++ ) {
        if (h->GetBinCenter(i)<-200 ) {
          h->SetBinContent(i,0);
          h->SetBinError(i,0);
        }
      }
 
    }
 
    htest()->Draw("e3lhistsame");
    
    band_plot( htest(), m_lo, m_hi, htest()->GetMinimum(), htest()->GetMaximum()  );
 
    if ( LINES ) htest()->Draw("e3lhist same");
#endif
      }
 
      std::string key = m_plotfilename;
 
      static TH1D* hnull = new TH1D("hnull", "", 1, 0, 1);
      hnull->SetMarkerColor(kWhite);
      hnull->SetLineColor(kWhite);
      hnull->SetMarkerStyle(0);
      hnull->SetLineStyle(0);
      hnull->SetLineWidth(0);
      hnull->SetMarkerSize(0);
 
      
      if ( lleg ) { 
      
    Legend& leg = *lleg;
    
    if ( mean ) { 
    
      char meanrefc[64];
      bool displayref = false;
      if ( s_meanplotref && href() ) {
        displayref = true;
        true_mean muref( href() );
        std::snprintf( meanrefc, 64, " <t> = %3.2f #pm %3.2f ms (ref)", muref.mean(), muref.error() );
      }
      else { 
        std::snprintf( meanrefc, 64, "%s", "" );
      }
      
      true_mean mutest( htest() );
      char meanc[64];
      std::snprintf( meanc, 64, " <t> = %3.2f #pm %3.2f ms", mutest.mean(), mutest.error() );
      
      std::string dkey = key;
      
      std::string remove[7] = { "TIME_", "Time_", "All_", "Algorithm_", "Class_", "HLT_", "Chain_HLT_" };
      
      if ( dkey.find("Chain")!=std::string::npos ) {
        if ( dkey.find("__")!=std::string::npos ) dkey.erase( 0, dkey.find("__")+2 );
      } 
      
      
      for ( int ir=0 ; ir<7 ; ir++ ) { 
        if ( dkey.find( remove[ir] )!=std::string::npos ) dkey.erase( dkey.find( remove[ir]), remove[ir].size() );
      } 
      
      std::string rkey = dkey;
      
      
      if ( LINEF || leg.size() < m_max_entries ) { 
        dkey += std::string(" : ");
        
        if ( (dkey+meanc).size()>58 ) { 
          leg.AddEntry( htest(), dkey, "p" );
          leg.AddEntry( hnull,   meanc,        "p" ); 
        }
        else { 
          leg.AddEntry( htest(), (dkey+meanc).c_str(), "p" );
        }     
        
        if ( displayref ) { 
          rkey += std::string(" : ");
          //  leg.AddEntry( hnull, "", "l" );
          
          if ( (rkey+meanrefc).size()>58 ) { 
        leg.AddEntry( href(), rkey, "l" );
        leg.AddEntry( hnull,  meanrefc,     "l" ); 
          }
          else {
        leg.AddEntry( href(), (rkey+meanrefc).c_str(), "l" );
          }
        }
      }
      
    }
    else { 
      if ( !mc() ) { 
        if ( LINEF || leg.size()<m_max_entries ) leg.AddEntry( htest(), key, "p" );
      }
      else { 
        if ( LINEF || leg.size()<m_max_entries ) leg.AddEntry( htest(), key, "f" );
      }
    }
    
    m_entries++;
    
    if ( drawlegend ) leg.Draw();
 
 
    if ( xbeam!=0 || ybeam!=0 ) {
      //      DrawLabel( 0.19, 0.24+i*0.085, label( "x_{beam} = %6.3lf mm", int(1000*xbeam + 0.5)*0.001), htest()->GetLineColor() );
      //      DrawLabel( 0.19, 0.20+i*0.085, label( "y_{beam} = %6.3lf mm", int(1000*ybeam + 0.5)*0.001), htest()->GetLineColor() );
      DrawLabel( 0.19, 0.20+i*0.045, label( "x =%6.3lf mm  y =%6.3lf mm   off =%6.3lf mm", xbeam, ybeam, offbeam, 0 ), htest()->GetLineColor() ); 
      //      DrawLabel( 0.19, 0.20+i*0.045,
             // int(1000*xbeam + 0.5)*0.001,
             // int(1000*ybeam + 0.5)*0.001,
             // int(1000*offbeam + 0.5)*0.001 ),
             // htest()->GetLineColor() );
    }
    
      }
      
    }
  }
 
 
 
  void DrawLegend( int i, Legend& leg, bool mean=false, bool first=true, bool drawlegend=false ) { 
    
    if ( htest() ) {
      gStyle->SetOptStat(0);
      if ( href() ) { 
    href()->SetLineColor(colours[i%6]);
    href()->SetLineStyle(2);
    href()->SetMarkerStyle(0);
      }
 
      if ( LINEF ) htest()->SetLineColor(colours[i%6]);
      htest()->SetLineStyle(1);
      if ( LINEF ) htest()->SetMarkerColor(htest()->GetLineColor());
      if ( LINEF ) htest()->SetMarkerStyle(markers[i%6]);
 
      if ( htest() ) std::cout << "\tentries: " << plotable( htest() );
      std::cout << std::endl;
 
      if ( first )  {
 
    if ( tgtest() ) { 
        zeroErrors(htest());
        htest()->GetXaxis()->SetMoreLogLabels(true);
        if ( trim_errors() ) trim_tgraph( htest(), tgtest() );
 
 
        // htest()->Draw("ep");
        if ( LINES ) htest()->Draw("lhistsame");
        setParameters( htest(), tgtest() );
        //   tgtest()->Draw("esame");
    }
    else { 
        htest()->GetXaxis()->SetMoreLogLabels(true);
        //    htest()->Draw("ep");
        //  if ( LINES ) htest()->Draw("lhistsame");
    }
       
      }
 
 
#if 0
      if ( s_plotref && href() ) {
    if ( contains(href()->GetName(),"_vs_")  || 
         contains(href()->GetName(),"sigma") || 
         contains(href()->GetName(),"mean") || 
         contains(href()->GetName(),"_eff")  ||
         contains(href()->GetName(),"Res_") || 
         contains(href()->GetName(),"Eff_") ) href()->Draw("hist same][");
    else                                      href()->Draw("hist same");
      }
 
      if ( tgtest() ) { 
    zeroErrors(htest());
 
    if ( trim_errors() ) trim_tgraph( htest(), tgtest() );
    setParameters( htest(), tgtest() );
    tgtest()->Draw("e1same");
    if ( LINES ) tgtest()->Draw("lsame");
 
      }
#endif
 
      
#if 0
      if ( htest()->GetMarkerStyle()>23 ) { 
    TH1D* hnull = (TH1D*)htest()->Clone("duff"); hnull->SetDirectory(0);
    zeroErrors( hnull );
    hnull->SetLineColor(kWhite);
    hnull->SetMarkerStyle( htest()->GetMarkerStyle()-4 );
    //  hnull->SetMarkerStyle( 0 ); 
    hnull->SetMarkerColor(kWhite);
    hnull->SetMarkerSize( htest()->GetMarkerSize()*0.75 );
    // hnull->SetMarkerSize( 0 );
    hnull->DrawCopy("l same");
    delete hnull;
      }
#endif
 
      //      htest()->Draw("ep same");
      //      if ( LINES ) htest()->Draw("lhist same");
 
      // href()->Draw("lhistsame");
      // htest()->Draw("lhistsame");
 
      std::string key = m_plotfilename;
 
      static TH1D* hnull = new TH1D("hnull", "", 1, 0, 1);
      hnull->SetMarkerColor(kWhite);
      hnull->SetLineColor(kWhite);
      hnull->SetMarkerStyle(0);
      hnull->SetLineStyle(0);
      hnull->SetLineWidth(0);
      hnull->SetMarkerSize(0);
 
      
      if ( mean ) { 
 
    char meanrefc[64];
    bool displayref = false;
    if ( s_meanplotref && href() ) {
      displayref = true;
      true_mean muref( href() );
      std::sprintf( meanrefc, " <t> = %3.2f #pm %3.2f ms (ref)", muref.mean(), muref.error() );
    }
    else { 
      std::sprintf( meanrefc, "%s", "" );
    }
 
 
    true_mean mutest( htest() );
    char meanc[64];
    std::sprintf( meanc, " <t> = %3.2f #pm %3.2f ms", mutest.mean(), mutest.error() );
    
    std::string dkey = key;
 
    std::string remove[7] = { "TIME_", "Time_", "All_", "Algorithm_", "Class_", "HLT_", "Chain_HLT_" };
 
    if ( dkey.find("Chain")!=std::string::npos ) {
      if ( dkey.find("__")!=std::string::npos ) dkey.erase( 0, dkey.find("__")+2 );
    } 
      
 
    for ( int ir=0 ; ir<7 ; ir++ ) { 
      if ( dkey.find( remove[ir] )!=std::string::npos ) dkey.erase( dkey.find( remove[ir]), remove[ir].size() );
    } 
 
    std::string rkey = dkey;
 
 
    if ( LINEF || leg.size() < m_max_entries ) { 
      dkey += std::string(" : ");
 
      if ( (dkey+meanc).size()>58 ) { 
        leg.AddEntry( htest(), dkey, "p" );
        leg.AddEntry( hnull,   meanc,        "p" ); 
      }
      else { 
        leg.AddEntry( htest(), (dkey+meanc).c_str(), "p" );
      }   
 
      if ( displayref ) { 
        rkey += std::string(" : ");
        //  leg.AddEntry( hnull, "", "l" );
 
        if ( (rkey+meanrefc).size()>58 ) { 
          leg.AddEntry( href(), rkey, "l" );
          leg.AddEntry( hnull,  meanrefc,     "l" ); 
        }
        else {
          leg.AddEntry( href(), (rkey+meanrefc).c_str(), "l" );
        }
      }
    }
 
      }
      else { 
    if ( !mc() ) { 
      if ( LINEF || leg.size()<m_max_entries ) leg.AddEntry( htest(), key, "p" ); 
    }
    else { 
      if ( LINEF || leg.size()<m_max_entries ) leg.AddEntry( htest(), key, "f" );
    }
      }
 
      m_entries++;
 
      if ( drawlegend ) leg.Draw();
 
    }
  }
 
  

  void Print(const std::string& s="") {
    if ( s!="" ) gPad->Print(s.c_str());
    else         gPad->Print(m_plotfilename.c_str());
  } 
 
  T* htest() { return m_htest; }
  T* href()  { return m_href; }
 
  bool mc(bool b) { return m_mc=b; }
 
  bool mc() const { return m_mc; }  
 
  TGraphAsymmErrors* tgtest() { return m_tgtest; }
  TGraphAsymmErrors* tgref()  { return m_tgref; }
 
  void max_entries( int i ) { m_max_entries = i; } 
 
public:
 
  static void setplotref( bool b )     { s_plotref=s_meanplotref=b; }
  static void setmeanplotref( bool b ) { s_meanplotref=b; }
 
  void xaxis( const AxisInfo* a ) { m_xaxis = a; }
  void yaxis( const AxisInfo* a ) { m_yaxis = a; }
 
  const AxisInfo* xaxis() const { return m_xaxis; } 
  const AxisInfo* yaxis() const { return m_yaxis; } 
 
private:

  T* m_htest;
  T* m_href;
 
  TGraphAsymmErrors* m_tgtest;
  TGraphAsymmErrors* m_tgref;
 
  std::string m_plotfilename;
 
  static bool s_plotref;
  static bool s_meanplotref;
 
  size_t  m_max_entries;
  size_t  m_entries;
 
  bool m_trim_errors;
 
  bool m_mc;
 
  double m_lo; 
  double m_hi;
 
  double m_xlo; 
  double m_xhi;
 
  const AxisInfo* m_xaxis;
  const AxisInfo* m_yaxis;
  
};
 
 
typedef tPlotter<TH1F> Plotter;
 

template<typename T>
bool tPlotter<T>::s_plotref = true;
 
 
template<typename T>
bool tPlotter<T>::s_meanplotref = true;
 
 
 
bool empty( TH1* h );
 
 
 
inline void hminus(TH1* h) { 
  std::cout << __FUNCTION__ << std::endl; 
  for ( int i=1 ; i<=h->GetNbinsX() ; i++ ) { 
    double duff = h->GetBinContent(i);
    if (  duff<0 ) { 
      std::cout<< "\t\t" << __FUNCTION__ << " " << h->GetName() << "  " << i << " " << h->GetBinContent(i) << " " << (duff*1e6) << std::endl;  
    }
  }
  h->DrawCopy();
  gPad->Print( (std::string("duff-")+h->GetName()+".pdf").c_str() );
}
 

class Plots : public std::vector<Plotter> { 
  
public:
  
  Plots(const std::string& s="", bool errors=false ) : 
    m_name(s), 
    m_logx(false), m_logy(false), 
    m_maxset(false), m_max(0),
    m_minset(false), m_min(0),
    m_rangeset(false), 
    m_lo(0.0), m_hi(0.0),
    m_trim_errors(errors)
  { }
 
  double realmin( double lo=0, double hi=0 ) {
    bool first = true;
    double min = 1000;
    for ( unsigned i=0 ; i<size() ; i++ ) {
      double rmtest = ::realmin( at(i).htest(), false, lo, hi );
      if ( rmtest!=0 && ( first || min>rmtest ) ) min = rmtest;
      if ( rmtest!=0 ) first = false;
    }
    return min;
  }
 
  double realmax(double lo=0, double hi=0) {
    bool first = true;
    double max = 0;
    for ( unsigned i=0 ; i<size() ; i++ ) {
      //      double rmref  = realmin( at(i).href(), false );
      double rmtest = ::realmax( at(i).htest(), false, lo, hi );
      if ( rmtest!=0 && ( first || max<rmtest ) ) max = rmtest;
      if ( rmtest!=0 ) first = false;
    }
    return max;
  }
 
 
  
  void MaxScale(double scale=1.1, double lo=0, double hi=0) {  
    
    if ( size()<1 ) return;
 
    double tmax = realmax(lo,hi);
    double tmin = realmin(lo,hi);
   
    m_max = scale*tmax;
    
    if ( m_logy ) m_min = tmin;
 
    for ( unsigned i=0 ; i<size() ; i++ ) {
      if ( at(i).href() ) at(i).href()->SetMaximum(scale*tmax);
      at(i).htest()->SetMaximum(scale*tmax);
    } 
 
  }
 
 
  void MinScale( double scale, double lo=0, double hi=0 ) { 
 
    if ( size()<1 ) return;
 
    if ( scale==0 ) { 
      for ( unsigned i=0 ; i<size() ; i++ ) {
    if ( at(i).href() ) at(i).href()->SetMinimum(0);
    at(i).htest()->SetMinimum(0);
      }  
      return;
    }
 
    
    double tmin = 0;
 
    if ( lo!=hi ) tmin = realmin( lo, hi );
    else          tmin = realmin();
 
    m_min = scale*tmin;
 
    for ( unsigned i=0 ; i<size() ; i++ ) {
      if ( at(i).href() ) at(i).href()->SetMinimum(scale*tmin);
      at(i).htest()->SetMinimum(scale*tmin);
    }
  }
 
 
  void Min( double scale ) { 
    m_minset = true;
    for ( unsigned i=0 ; i<size() ; i++ ) {
      if ( at(i).href() ) at(i).href()->SetMinimum(scale);
      at(i).htest()->SetMinimum(scale);
      if ( m_logy ) { 
    if ( at(i).href() ) if ( at(i).href()->GetMinimum()<=0 )  at(i).href()->GetMinimum(1e-4);
    if ( at(i).htest()->GetMinimum()<=0 ) at(i).htest()->GetMinimum(1e-4);
      }
    }
  }
  
 
  void Max( double scale ) { 
    m_maxset = true;
    for ( unsigned i=0 ; i<size() ; i++ ) {
      if ( at(i).href() ) at(i).href()->SetMaximum(scale);
      at(i).htest()->SetMaximum(scale);
    }
  }
 
  std::vector<double> findxrange( bool symmetric=false ) { 

    
    std::vector<double> v(2,0);
    
    TH1F* hf = at(0).htest();
 
    double vlo  =  1e21;
    double vhi  = -1e21;
    
    if ( hf->GetBinLowEdge(1)<vlo )                 vlo = hf->GetBinLowEdge(1);
    if ( hf->GetBinLowEdge(hf->GetNbinsX()+1)>vhi ) vhi = hf->GetBinLowEdge( hf->GetNbinsX()+1 );
      
    if ( size()>0 ) v = ::findxrangeuser( hf, symmetric );
 
    bool first = false;
 
    for ( unsigned i=1 ; i<size() ; i++ ) { 
  
      hf = at(i).htest();
 
      if ( ::empty( hf ) ) continue;
 
      if ( hf->GetBinLowEdge(1)<vlo )                 vlo = hf->GetBinLowEdge(1);
      if ( hf->GetBinLowEdge(hf->GetNbinsX()+1)>vhi ) vhi = hf->GetBinLowEdge( hf->GetNbinsX()+1 );
 
      std::vector<double> limits = ::findxrangeuser( hf, symmetric );
 
      double lo = limits[0];
      double hi = limits[1];
 
      if ( first ) { 
    v[0] = lo;
    v[1] = hi;
      }
      else { 
    if ( v[0]>lo ) v[0] = lo;
    if ( v[1]<hi ) v[1] = hi;
      }
 
      first = false;
    }
 
    double upper = ( v[1]-v[0] )*1.1 + v[0];
    double lower = v[0] - ( v[1]-v[0] )*0.1; 
 
    if ( m_logx ) {
      double dx = std::log10(v[1])-std::log10(v[0]);
      upper = std::pow(10,dx*1.1 + std::log10(v[0]));
      lower = std::pow(10,std::log10(v[0]) - dx*0.1); 
    }
 
    if ( lower<vlo ) lower = vlo;
    if ( upper>vhi ) upper = vhi;
 
    v[0] = lower;
    v[1] = upper;
    
    return v;
  }
  
 
 
  void sortx( const AxisInfo& xinfo ) {
    
    if ( xinfo.rangeset() ) {       
      std::cout << "xr1: " << xinfo << std::endl;
      m_lo = xinfo.lo();
      m_hi = xinfo.hi();
    }
    
    if ( xinfo.autoset() && size() > 0 ) {
      std::vector<double> limits = findxrange( xinfo.symmetric() );
      if ( xinfo.rangeset() ) { 
    std::cout << "xr2: " << xinfo << std::endl;
    if ( limits[0]<m_lo ) m_lo = limits[0];
    if ( limits[1]>m_hi ) m_hi = limits[1];
      }
      else { 
    std::cout << "xr3: " << xinfo << std::endl;
    m_lo = limits[0];
    m_hi = limits[1];
      }
    }
    else if (size() == 0)
    {
        std::cout<<"Warning in computils.h::sortx() size=0.  Setting m_lo/m_hi to 0/1.  You will probably have empty figures."<<std::endl;
        m_lo = 0;
        m_hi = 1;
    }
 
    if ( xinfo.rangeset() || xinfo.autoset() ) { 
      SetRangeUser( m_lo, m_hi );
      if ( xinfo.log() && m_lo>0 ) SetLogx(true);
      else                         SetLogx(false);
    }
 
  }
 
 
  double lo() const { return m_lo; }
  double hi() const { return m_hi; }
 
 
  void xrange(bool symmetric=false) { 
    m_rangeset = false;
    for ( unsigned i=0 ; i<size() ; i++ ) { 
      if ( at(i).href() ) ::xrange( at(i).href(), symmetric );
      ::xrange( at(i).htest(), symmetric );
    }
  }
 
  void SetRangeUser( double lo, double hi ){ 
    m_rangeset = true;
    m_lo = lo;
    m_hi = hi;
    for ( unsigned i=0 ; i<size() ; i++ ) { 
      if ( at(i).href() ) at(i).href()->GetXaxis()->SetRangeUser( m_lo, m_hi );
      at(i).htest()->GetXaxis()->SetRangeUser( m_lo, m_hi );
      at(i).SetRange(m_lo, m_hi);
    }
  }
  
 
  void limits() { 
    double rmax = realmax();
    double rmin = realmin();    
    if ( rmin<0 ) { 
      std::cout << "\tlimits \t" << m_name << "\tmin " << rmin << "\tmax " << rmax << std::endl; 
    }
  }
 
 
   
  void Draw( Legend& leg, bool means=false ) {  
    Draw_i( leg, means );
    if ( LINES ) { 
      LINES=false;
      Draw_i( leg, means );
      LINES=true;
    }
  }
 
  void Draw_i( Legend& leg, bool means=false ) {  
 
    bool first = true;
 
#if 1
    if ( m_logy ) {      
      for ( unsigned i=0 ; i<size() ; i++, first=false ) { 
    double ymax = at(i).htest()->GetMaximum();
    double ymin = at(i).htest()->GetMinimum();
    at(i).htest()->GetYaxis()->SetMoreLogLabels(true);
    if ( ymax/ymin>1e6 ) at(i).htest()->GetYaxis()->SetMoreLogLabels(false);
    break;
      }
    }
#endif
 
#if 1
    for ( unsigned i=0 ; i<size() ; i++ ) at(i).trim_errors( m_trim_errors );

 
#endif
    
    // for ( unsigned i=0 ; i<size() ; i++,  first=false ) at(i).Draw( i, &leg, means, first, (i==size()-1) );
    //    for ( unsigned i=size() ; i-- ;  first=false ) at(i).Draw( i, &leg, means, first, i==0 );
 
    for ( unsigned i=size() ; i-- ;  first=false ) at(i).Draw( i, &leg, means, first, i==0 );
 
    // dev versions ... 
    //  for ( unsigned i=0 ; i<size() ; i++,  first=false ) at(i).DrawLegend( i, leg, means, first, (i==size()-1) );
    // for ( unsigned i=0 ; i<size() ; i++,  first=false ) at(i).Draw( i, &leg, means, first, i==size() );
 
 
    
    if ( s_watermark ) DrawLabel(0.1, 0.02, "built "+stime()+release, kBlack, 0.03 );
 
    gPad->SetLogy(m_logy);
    gPad->SetLogx(m_logx);
 
  }
 
  void SetLogx( bool b=true ) { m_logx=b; } 
  void SetLogy( bool b=true ) { m_logy=b; } 
 
  std::string GetXaxisTitle() { 
    if ( size()>0 ) return at(0).htest()->GetXaxis()->GetTitle();
    return "";
  }
 
  std::string GetYaxisTitle() { 
    if ( size()>0 ) return at(0).htest()->GetYaxis()->GetTitle();
    return "";
  }
 
  void SetXaxisTitle(const std::string& s) { 
    if ( size()>0 ) at(0).htest()->GetXaxis()->SetTitle(s.c_str());
  }
 
  void SetYaxisTitle(const std::string& s) { 
    if ( size()>0 ) at(0).htest()->GetYaxis()->SetTitle(s.c_str());
  }
 

  void push_back(const Plotter& val) {
    std::vector<Plotter>::push_back( val );
  }
 
public:
 
  static void setwatermark(bool b) { s_watermark = b; }
 
private:
  
  std::string m_name;

  bool m_logx;
  bool m_logy;
  
  bool   m_maxset;
  double m_max;
  
  bool   m_minset;
  double m_min;

  bool   m_rangeset;
  double m_lo;
  double m_hi;
 
  bool m_trim_errors;
 
private:
 
  static bool s_watermark;
 
};
 
 
 

 
class HistDetails { 
 
public:
 
  HistDetails( const std::vector<std::string>& v ) : m_details(v), m_extra("") {
    if ( v.size()!=6 ) throw std::exception();
    m_xinfo = m_details[2];
    m_yinfo = m_details[4];
    getextra();
  }
 
  template<typename Iterator>
  HistDetails( Iterator first, Iterator last ) : m_details( first, last ), m_extra("") {  
    if ( m_details.size()!=6 ) throw std::exception();    
    m_xinfo = m_details[2];
    m_yinfo = m_details[4];
    getextra();
  }
 
  const std::string&  name() const { return m_details[0]; } 
 
  const std::string&  detail() const { return m_extra; }
 
  const std::string&  info() const { return m_details[1]; } 
 
  const std::string& xtitle() const { return m_details[3]; }
  const std::string& ytitle() const { return m_details[5]; }
 
  const AxisInfo& xaxis() const { return m_xinfo; }
  const AxisInfo& yaxis() const { return m_yinfo; }
 
private:
 
  void getextra() { 
    if ( contains( m_details[0], "-" ) ) { 
      m_extra = m_details[0].substr( m_details[0].find('-'), m_details[0].size() );
      m_details[0] = m_details[0].substr( 0, m_details[0].find('-') );
    }
    if ( contains( m_details[0], "+" ) ) { 
      m_extra = m_details[0].substr( m_details[0].find('+'), m_details[0].size() );
      m_details[0] = m_details[0].substr( 0, m_details[0].find('+') );
    }
  }
 
private:
 
  std::vector<std::string> m_details;
 
  std::string m_extra;
 
  AxisInfo m_xinfo;
  AxisInfo m_yinfo;
 
};
 
 
 
inline std::ostream& operator<<( std::ostream& s, const HistDetails& h ) { 
  return s << "[ " << h.name() << "  \tx: \"" << h.xtitle() << "\"   " << h.xaxis() << "\t\ty: \"" << h.ytitle() << "\"   " << h.yaxis() << " ]"; 
}
 
 
 
// plot panel inforamtion
 
class Panel { 
 
public:

  Panel( const std::string& s, int nc ) : 
    m_name(s), m_nhist(-1), m_nrows(-1), m_ncols(nc) { 
    m_hist.reserve( nc );
  } 

  Panel( const std::string& s, int nr, int nc ) : 
    m_name(s), m_nhist(nr*nc), m_nrows(nr), m_ncols(nc) { 
    m_hist.reserve( m_nhist );
  } 
 
  void push_back( const HistDetails& h ) { 
    m_hist.push_back( h );
    m_nhist = m_hist.size();
    m_nrows = m_nhist/m_ncols + (m_nhist%m_ncols ? 1 : 0 );
  }
 
  void push_back( const std::vector<std::string>& s ) {
    m_hist.emplace_back( s );
    m_nhist = m_hist.size();
    m_nrows = m_nhist/m_ncols + (m_nhist%m_ncols ? 1 : 0 );
  }
 
  template<typename Iterator>
  void push_back( Iterator first, Iterator last ) { 
    m_hist.emplace_back( first, last );
    m_nhist = m_hist.size();
    m_nrows = m_nhist/m_ncols + (m_nhist%m_ncols ? 1 : 0 );
  }
 
  
  const std::string& name() const { return m_name; }
 
  size_t size() const { return m_hist.size(); }
 
  const HistDetails& operator[](int i) const { return m_hist.at(i); }
  HistDetails&       operator[](int i)       { return m_hist.at(i); }
 
  const HistDetails& back() const { return m_hist.back(); }
   HistDetails&      back()       { return m_hist.back(); }
 
  int nrows() const { return m_nrows; }
  int ncols() const { return m_ncols; }
 
private:
 
  std::string               m_name;
 
  int                       m_nhist;
 
  int                       m_nrows;
  int                       m_ncols;
 
  std::vector<HistDetails> m_hist;
 
};
 
 
 
inline std::ostream& operator<<( std::ostream& s, const Panel& p ) { 
  s << "Panel: " << p.name();
  if ( p.size() == 1 ) s << "\t" << p[0];
  else for ( size_t i=0 ; i<p.size() ; i++ ) s << "\n\t" << p[i];
  return s;
}
 
 
 
 
 
#endif // COMPUTILS_H