Histogram Class Reference

Class for computing a histogram and some statistics: average, min, max, mean, std.dev, sum. More...

#include <Histogram.h>

Inheritance diagram for Histogram:

Collaboration diagram for Histogram:

Public Types
typedef unsigned long	count_t
typedef std::vector< count_t >	vect_t

Public Member Functions
	Histogram (size_t size=256)
	Histogram (const Histogram &histogram)
void	setSize (size_t s)
	Sets the number of bins; the resolution of the histogram.
int	getSize () const
int	autoSize (const std::type_info &type)
void	clearBins ()
	Does not change the size of the histogram.
template<class T >
void	compute (const T &src, const std::type_info &type=typeid(double), const UniTuple< double, 2 > &scaling={1.0, 0.0})
	Collect distribution. More...
void	setSampleCount (long int n)
	Does not change the size of the histogram. More...
size_t	getSampleCount () const
void	setRange (double dataMin, double dataMax)
	Set range of original (physical) values to be mapped on the limited number of bins. Note: max refers to open upper limit.
void	setRange (const Range< double > &range)
	Set range of original (physical) values to be mapped on the limited number of bins. Note: max refers to open upper limit.
void	deriveScaling (const ValueScaling &s, const Type &type)
void	setScale (const ValueScaling &scaling)
int	getInMin () const
	Set range of original (physical) values to be mapped on the limited number of bins. Note: max refers to open upper limit.
int	getUpperBoundIn () const
	Returns the upperLimit (exclusive)
int	getOutMin () const
int	getUpperBoundOut () const
	Returns the upperLimit (exclusive)
void	setMedianPosition (double pos)
	Set location of the median, if not in the middle (50%).
template<class T >
void	increment (T i)
template<class T >
void	increment (T i, int count)
template<class T >
void	incrementRaw (T i)
template<class T >
void	incrementRaw (T i, int count)
template<class T >
void	decrement (T i)
template<class T >
void	decrement (T i, int count)
template<class T >
void	decrementRaw (T i)
template<class T >
void	decrementRaw (T i, int count)
template<class T >
T	scaleOut (size_type i) const
template<class T >
T	getMax () const
	Statistics.
template<class T >
T	getMin () const
template<class T >
T	getSum () const
	Sum of the samples. More...
template<class T >
T	getMean () const
	Unscaled mean.
template<class T >
T	getMedian () const
template<class T >
T	getWeightedMedian (float p) const
template<class T >
T	getVariance () const
	Computes variance of the values inside the window.
template<class T >
T	getStdDeviation () const
const vect_t	getVector () const
std::ostream &	toStream (std::ostream &ostr) const
void	dump (std::ostream &ostr=std::cout)
double	getValue ()
double	getValue (char c)
	Return requested statistic.
void	setValueFunc (char c)

Static Public Member Functions
static std::size_t	recommendSizeByType (const std::type_info &type, std::size_t defaultValue=256)

Public Attributes
ValueScaling	scaling
std::string	delimiter

Protected Types
typedef double(Histogram::*	stat_ptr_t) () const

Protected Member Functions
void	initialize ()
stat_ptr_t	getStatisticPtr (char c)

Protected Attributes
double(Histogram::*	statisticPtr )() const

Detailed Description

Class for computing a histogram and some statistics: average, min, max, mean, std.dev, sum.

T input type, eg. unsigned char for 8-bit images. T2 output type for values not within the set of input values, like std.dev.

Member Function Documentation

compute()

void compute	(	const T &	src,
		const std::type_info &	type = typeid(double),
		const UniTuple< double, 2 > &	scaling = {1.0, 0.0}
	)

Collect distribution.

Template Parameters

T	- an iterable type (implements begin() and end())

Parameters

src	- source data
scaling	- linear scaling

getSum()

T getSum ( ) const

inline

Sum of the samples.

TODO: handle somehow no-data and other markers - with a different function?

setSampleCount()

void setSampleCount ( long int  n )

inline

Does not change the size of the histogram.

Sets the expected sample count. Deprecating.

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The documentation for this class was generated from the following files:

• src/drain/util/Histogram.h
• src/drain/util/Histogram.cpp