FastHisto Class Reference

#include <FastTemplate.h>

Inheritance diagram for FastHisto:

Public Member Functions
void	Dump () const
	FastHisto ()
	FastHisto (const TH1 &hist)
	FastHisto (const FastHisto &other)
T	GetAt (const T &x) const
T	IntegralWidth () const
void	Normalize ()
FastHisto &	operator= (const FastHisto &other)
FastHisto &	operator= (const TH1 &other)
void	swap (FastHisto &other)
	~FastHisto ()
Public Member Functions inherited from FastTemplate
void	Clear ()
void	CopyValues (const FastTemplate &other)
void	CopyValues (const TH1 &other)
void	CopyValues (const TH2 &other)
void	CropUnderflows (T minimum=1e-9)
	protect from underflows (*this = max(*this, minimum)); More...
void	Dump () const
void	Exp ()
	*this = exp(*this) More...
	FastTemplate ()
	FastTemplate (unsigned int size)
	FastTemplate (const FastTemplate &other)
	FastTemplate (const TH1 &other)
	FastTemplate (const TH2 &other)
T	Integral () const
void	Log ()
	*this = log(*this) More...
void	LogRatio (const FastTemplate &reference)
	*this = log(*this)/(reference) More...
void	Meld (const FastTemplate &diff, const FastTemplate &sum, T x, T y)
	Does this += x * (diff + (sum)*y) More...
FastTemplate &	operator= (const FastTemplate &other)
FastTemplate &	operator= (const TH1 &other)
T &	operator[] (unsigned int i)
const T &	operator[] (unsigned int i) const
void	Resize (unsigned int newsize)
void	Scale (T factor)
const unsigned int	size () const
void	Subtract (const FastTemplate &reference)
	*this = *this - reference More...
	~FastTemplate ()

Private Attributes
T *	binEdges_
T *	binWidths_

Additional Inherited Members
Public Types inherited from FastTemplate
typedef double	T
Static Public Member Functions inherited from FastTemplate
static void	SumDiff (const FastTemplate &h1, const FastTemplate &h2, FastTemplate &sum, FastTemplate &diff)
	assigns sum and diff More...
Protected Attributes inherited from FastTemplate
unsigned int	size_
T *	values_

Detailed Description

Definition at line 64 of file FastTemplate.h.

Constructor & Destructor Documentation

FastHisto::FastHisto ( )

inline

Definition at line 66 of file FastTemplate.h.

: FastTemplate(), binEdges_(0), binWidths_(0) {}

FastHisto::FastHisto

(

const TH1 &

hist

)

Definition at line 45 of file FastTemplate.cc.

References binEdges_, binWidths_, i, and FastTemplate::size_.

                                    :
    FastTemplate(hist),
    binEdges_(new T[size_+1]),
    binWidths_(new T[size_])
{
    for (unsigned int i = 0; i < size_; ++i) {
        binEdges_[i] = hist.GetBinLowEdge(i+1);
        binWidths_[i] = hist.GetBinWidth(i+1);
    }
    binEdges_[size_] = hist.GetBinLowEdge(size_+1);
}

FastHisto::FastHisto

(

const FastHisto &

other

)

Definition at line 57 of file FastTemplate.cc.

References binEdges_, binWidths_, and FastTemplate::size_.

                                           :
    FastTemplate(other),
    binEdges_(size_ ? new T[size_+1] : 0),
    binWidths_(size_ ? new T[size_] : 0)
{
    if (size_) {
        memcpy(binEdges_,  other.binEdges_, (size_+1)*sizeof(T));
        memcpy(binWidths_, other.binWidths_, size_*sizeof(T));
    }
}

FastHisto::~FastHisto ( )

inline

Definition at line 83 of file FastTemplate.h.

References binEdges_, and binWidths_.

{ delete [] binEdges_; delete [] binWidths_; }

Member Function Documentation

void FastHisto::Dump

(

void

)

const

Definition at line 80 of file FastTemplate.cc.

References binEdges_, binWidths_, i, FastTemplate::size_, and FastTemplate::values_.

                           {
    printf("--- dumping histo template with %d bins in range %.2f - %.2f (@%p)---\n", size_+1, binEdges_[0], binEdges_[size_], (void*)values_);
    for (unsigned int i = 0; i < size_; ++i) {
        printf(" bin %3d, x = %6.2f: yval = %9.5f, width = %6.3f\n", 
                    i, 0.5*(binEdges_[i]+binEdges_[i+1]), values_[i], binWidths_[i]);
    }
    printf("\n"); 
}

FastHisto::T FastHisto::GetAt

(

const T &

x

)

const

Definition at line 68 of file FastTemplate.cc.

References binEdges_, match(), FastTemplate::size_, and FastTemplate::values_.

Referenced by FastVerticalInterpHistPdf::evaluate().

                                            {
    T *match = std::lower_bound(binEdges_, binEdges_+size_+1, x);
    if (match == binEdges_ || match == binEdges_+size_+1) return T(0.0);
    return values_[match - binEdges_ - 1];
}

FastHisto::T FastHisto::IntegralWidth

(

)

const

Definition at line 74 of file FastTemplate.cc.

References binWidths_, i, FastTemplate::size_, pileupDistInMC::total, and FastTemplate::values_.

Referenced by Normalize().

                                          {
    double total = 0;
    for (unsigned int i = 0; i < size_; ++i) total += values_[i] * binWidths_[i];
    return total;
}

void FastHisto::Normalize ( )

inline

Definition at line 92 of file FastTemplate.h.

References f, IntegralWidth(), and FastTemplate::Scale().

Referenced by FastVerticalInterpHistPdf::syncComponents(), FastVerticalInterpHistPdf::syncNominal(), and FastVerticalInterpHistPdf::syncTotal().

                         {
            T sum = IntegralWidth();
            if (sum > 0) Scale(1.0f/sum);
        }

FastHisto& FastHisto::operator= ( const FastHisto &  other )

inline

Definition at line 69 of file FastTemplate.h.

References FastTemplate::CopyValues(), FastTemplate::size_, and swap().

                                                      { 
            if (size_ != other.size_) {
                FastHisto fh(other);
                swap(fh);
            } else CopyValues(other); 
            return *this; 
        }

FastHisto& FastHisto::operator= ( const TH1 &  other )

inline

Definition at line 76 of file FastTemplate.h.

References FastTemplate::CopyValues(), FastTemplate::size_, and swap().

                                                { 
            if (size_ != unsigned(other.GetNbinsX())) { 
                FastHisto fh(other);
                swap(fh);
            } else CopyValues(other); 
            CopyValues(other); return *this;  
        }

void FastHisto::swap ( FastHisto &  other )

inline

Definition at line 84 of file FastTemplate.h.

References binEdges_, binWidths_, FastTemplate::size_, std::swap(), and FastTemplate::values_.

Referenced by operator=().

                                    {
            std::swap(size_, other.size_);
            std::swap(values_, other.values_);
            std::swap(binWidths_, other.binWidths_);
            std::swap(binEdges_, other.binEdges_);
        }

Member Data Documentation

T* FastHisto::binEdges_

private

Definition at line 99 of file FastTemplate.h.

Referenced by Dump(), FastHisto(), GetAt(), swap(), and ~FastHisto().

T* FastHisto::binWidths_

private

Definition at line 100 of file FastTemplate.h.

Referenced by Dump(), FastHisto(), IntegralWidth(), swap(), and ~FastHisto().