Histogram Class Reference

#include <histogram.h>

Public Member Functions
	Histogram (int *densityCount, int noSamples)
	Constructs a histogram.
	~Histogram ()
	Destructor.
int	getNoSamples ()
double	densitySize (int index)
	Returns the density (normalized number of samples with value "index").
QPoint *	getQPointData (int verticalSize, int columnWidth, int pixelsPerStep, bool isBottomZero)
	Retrieves a list of points which when drawn as a polygon show the shape of a density distribution.

Detailed Description

Constructs a histogram.

Parameters:

	an	array of density counts, ie densityCount[10] is the number of samples with density 10.
	noSamples	number densityCount array items, ie number of densities that can occur.

Histogram::~Histogram ( )

Destructor.

double Histogram::densitySize ( int index )

Returns the density (normalized number of samples with value "index").

For index = 0, this would return amount of samples with density 0 relative to the highest density count.

Parameters:

index

density we're querrying.

Returns:: value between 0 and 1, 1 if the number of samples for the given density is the same as the number of samples for the most common density, 0.5 if it's exactly half the number, and 0.0 if there are no samples.

int Histogram::getNoSamples ( ) [inline]

QPoint * Histogram::getQPointData	(	int	verticalSize,
		int	columnWidth,
		int	pixelsPerStep,
		bool	isBottomZero
	)

Retrieves a list of points which when drawn as a polygon show the shape of a density distribution.

Parameters:

	verticalSize	vertical size, in pixels
	columnWidth	number of pixels per histogram column
	pixelsPerStep
	isBottomZero	vertical orientation, ie. should the polygon be rugged on top (true) or on bottom (false)

Returns:: a list of noSamples (as specified in the constructor) / pixelsPerStep + 2 points

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