Histogram Class Reference
[Interactive Image Histogram]

#include <histogram.h>

Detailed Description

The Histogram class is designed to provide an efficient data type independent routine for calculating the histogram of an array and allow easy access to it with the use of class Hash, which is a basic val cnt mapping.

History:: 2002-10-09 Dan Mingus - created/modified

Definition at line 68 of file histogram.h.


Public Member Functions
	Histogram ()
template<class DType>
void	calcHist (DType *data, int len)
	This function calculates the histogram for the given dataset.
vector< Hash >	getHist ()
	Get the histogram that was calculated with calcHist.
double	getMin ()
	Get the minimum value of the calculated dataset.
double	getMax ()
	Get the maximum value of the calculated dataset.
int	getLen ()
	Get the length of the calculated dataset.
int	getMaxCnt ()
	Get the maximum count in the histogram.
Private Member Functions
void	insert (double val)
	Add a new value to the histogram.
Hash *	find (double val)
	Find a Hash with "val" value.
Hash *	findGt (double val)
	Find the first Hash with mVal greater than val.
Private Attributes
int	mLen
int	mMaxCnt
double	mMin
double	mMax
vector< Hash >	mHist

Constructor & Destructor Documentation

Histogram::Histogram ( ) [inline]

Definition at line 179 of file histogram.h.

References mLen, mMax, mMaxCnt, and mMin.

Member Function Documentation

void Histogram::insert ( double val ) [inline, private]

Add a new value to the histogram.

find( double val ) would be called first to make sure the value is not allready present.

Definition at line 82 of file histogram.h.

References findGt(), and mHist.

Referenced by calcHist().

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Hash* Histogram::find ( double val ) [inline, private]

Find a Hash with "val" value.

Non-linear search.

Definition at line 90 of file histogram.h.

References mHist.

Referenced by calcHist().

Hash* Histogram::findGt ( double val ) [inline, private]

Find the first Hash with mVal greater than val.

Non-linear search.

Definition at line 135 of file histogram.h.

References mHist.

Referenced by insert().

template<class DType>

void Histogram::calcHist	(	DType *	data,
		int	len
	)			`[inline]`

This function calculates the histogram for the given dataset.

The dataset should be a numeric array. This will loop through every value in the dataset and store it's count in a Hash. When the routine ends, the member hash will be an array of value count mappings, or the histogram of this dataset.

Definition at line 194 of file histogram.h.

References find(), Hash::incCnt(), insert(), mHist, mLen, mMax, mMaxCnt, and mMin.

Referenced by HistogramSet::setData().

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