Histogram Class Reference

A simple histogram. More...

#include <histogram.h>

Inheritance diagram for Histogram:

Public Member Functions
	Histogram (int, double=0.0, double=1.0)
	Create a histogram.
	Histogram (int, double, double, const QVector< double > &)
	Create a histogram from a set.
	Histogram (int, const QVector< double > &)
	Return the size of the histogram.
	~Histogram ()
	Empty.
void	Insert (const double &)
	Add a value to the histogram.
double	Select (const double &) const
	Compute the value in the histogram corresponding to a given percentage of the cumulated values.
int	Value (int) const
	Return the value in a given bin.
int	GetSize () const
	Return the size of the histogram.
Ia	Range () const
	Return the range of values of the histogram.
void	Draw (const QString &="Histogram") const
	Draw.
void	ExportPDF (const QString &="histogram.pdf") const
	Draw.
void	ExportPNG (const QString &="histogram.png") const
	Draw.
QImage	CreateImage () const
	Create a (small) image showing the histogram distribution.
double	Interval () const
	Return the value in a given bin.

Protected Member Functions
int	Index (const double &) const
	Compute the entry of a given value.

Protected Attributes
QVector< int >	v
	Counts.
double	b = 1.0
	Interval.

Friends
std::ostream &	operator<< (std::ostream &s, const Histogram &h)
	Overloaded.

Detailed Description

A simple histogram.

See also

CumulatedHistogram

Constructor & Destructor Documentation

Histogram() [1/3]

Histogram::Histogram ( int size, double a = 0.0, double b = 1.0 )

explicit

Create a histogram.

Parameters

a,b	Range.
size	Number of bins.

Histogram() [2/3]

Histogram::Histogram	(	int	size,
		double	a,
		double	b,
		const QVector< double > &	values )

Create a histogram from a set.

Parameters

values	Set of values.
a,b	Range.
size	Number of bins.

Histogram() [3/3]

Histogram::Histogram	(	int	size,
		const QVector< double > &	values )

Return the size of the histogram.

Parameters

size	Number of bins.
values	Set of values.

Member Function Documentation

Index()

int Histogram::Index ( const double & x ) const

inlineprotected

Compute the entry of a given value.

Parameters

x

Real.

Insert()

void Histogram::Insert

(

const double &

x

)

Add a value to the histogram.

Parameters

x

Real.

Select()

double Histogram::Select

(

const double &

t

)

const

Compute the value in the histogram corresponding to a given percentage of the cumulated values.

This function does not compute the cumulated histogram. If many selections need to be done, it may be faster to compute the cumulated histogram first.

Parameters

t	Percentage, in [0.0,1.0].

Friends And Related Symbol Documentation

operator<<

std::ostream & operator<< ( std::ostream & s, const Histogram & h )

friend

Overloaded.

Parameters

s	Stream.
h	The histogram.