Class used to store data and make an histogram of the data frequency. More...

#include "histogram.h"

Collaboration diagram for ns3::Histogram:

Public Member Functions
	Histogram ()

	Histogram (double binWidth)
	Constructor.

void	AddValue (double value)
	Add a value to the histogram.

void	Clear ()
	Clear the histogram content.

uint32_t	GetBinCount (uint32_t index) const
	Get the number of data added to the bin.

double	GetBinEnd (uint32_t index) const
	Returns the bin end, i.e., (index+1)*binWidth.

double	GetBinStart (uint32_t index) const
	Returns the bin start, i.e., index*binWidth.

double	GetBinWidth (uint32_t index) const
	Returns the bin width.

uint32_t	GetNBins () const
	Returns the number of bins in the histogram.

void	SerializeToXmlStream (std::ostream &os, uint16_t indent, std::string elementName) const
	Serializes the results to an std::ostream in XML format.

void	SetDefaultBinWidth (double binWidth)
	Set the bin width.

Private Attributes
double	m_binWidth
	Bin width.

std::vector< uint32_t >	m_histogram
	Histogram data.

Detailed Description

Class used to store data and make an histogram of the data frequency.

Data are grouped in "bins", i.e., intervals. Each value is assigned to the bin according to the following formula: floor(value/binWidth). Hence, bin i groups the data from [i*binWidth, (i+1)binWidth).

This class only handles positive bins, i.e., it does not handles negative data.

Todo: Add support for negative data.

Todo: Add method(s) to estimate parameters from the histogram, see http://www.dspguide.com/ch2/4.htm

Definition at line 34 of file histogram.h.

Constructor & Destructor Documentation

◆ Histogram() [1/2]

ns3::Histogram::Histogram ( double binWidth )

Constructor.

Parameters

binWidth width of the histogram "bin".

Definition at line 90 of file histogram.cc.

References m_binWidth.

◆ Histogram() [2/2]

ns3::Histogram::Histogram ( )

Definition at line 95 of file histogram.cc.

References DEFAULT_BIN_WIDTH, and m_binWidth.

Member Function Documentation

◆ AddValue()

void ns3::Histogram::AddValue ( double value )

Add a value to the histogram.

Parameters

value the value to add

Definition at line 70 of file histogram.cc.

References m_binWidth, m_histogram, and NS_LOG_DEBUG.

Referenced by HistogramTestCase::DoRun(), ns3::FlowMonitor::ReportLastRx(), and RunBothModes().

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◆ Clear()

void ns3::Histogram::Clear ( )

Clear the histogram content.

Definition at line 85 of file histogram.cc.

References m_histogram.

◆ GetBinCount()

uint32_t ns3::Histogram::GetBinCount ( uint32_t index ) const

Get the number of data added to the bin.

Parameters

index the bin index

Returns: the number of data added to the bin

Definition at line 63 of file histogram.cc.

References m_histogram, and NS_ASSERT.

Referenced by HistogramTestCase::DoRun(), and RunBothModes().

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◆ GetBinEnd()

double ns3::Histogram::GetBinEnd ( uint32_t index ) const

Returns the bin end, i.e., (index+1)*binWidth.

Parameters

index the bin index

Returns: the bin start

Definition at line 44 of file histogram.cc.

References m_binWidth.

◆ GetBinStart()

double ns3::Histogram::GetBinStart ( uint32_t index ) const

Returns the bin start, i.e., index*binWidth.

Parameters

index the bin index

Returns: the bin start

Definition at line 38 of file histogram.cc.

References m_binWidth.

Referenced by HistogramTestCase::DoRun(), and RunBothModes().

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◆ GetBinWidth()

double ns3::Histogram::GetBinWidth ( uint32_t index ) const

Returns the bin width.

Note that all the bins have the same width.

Parameters

index the bin index

Returns: the bin width

Definition at line 50 of file histogram.cc.

References m_binWidth.

Referenced by HistogramTestCase::DoRun(), and RunBothModes().

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◆ GetNBins()

uint32_t ns3::Histogram::GetNBins ( ) const

Returns the number of bins in the histogram.

Returns: the number of bins in the histogram

Definition at line 32 of file histogram.cc.

References m_histogram.

Referenced by HistogramTestCase::DoRun(), and RunBothModes().

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◆ SerializeToXmlStream()

void ns3::Histogram::SerializeToXmlStream	(	std::ostream &	os,
		uint16_t	indent,
		std::string	elementName ) const

Serializes the results to an std::ostream in XML format.

Parameters

os	the output stream
indent	number of spaces to use as base indentation level
elementName	name of the element to serialize.

Definition at line 101 of file histogram.cc.

References m_binWidth, and m_histogram.

◆ SetDefaultBinWidth()

void ns3::Histogram::SetDefaultBinWidth ( double binWidth )

Set the bin width.

Note that you can change the bin width only if the histogram is empty.

Parameters

binWidth the bin width

Definition at line 56 of file histogram.cc.

References m_binWidth, m_histogram, and NS_ASSERT.

Referenced by ns3::FlowMonitor::GetStatsForFlow().

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Member Data Documentation

◆ m_binWidth

double ns3::Histogram::m_binWidth

private

Bin width.

Definition at line 109 of file histogram.h.

Referenced by Histogram(), Histogram(), AddValue(), GetBinEnd(), GetBinStart(), GetBinWidth(), SerializeToXmlStream(), and SetDefaultBinWidth().

◆ m_histogram

std::vector<uint32_t> ns3::Histogram::m_histogram

private

Histogram data.

Definition at line 108 of file histogram.h.

Referenced by AddValue(), Clear(), GetBinCount(), GetNBins(), SerializeToXmlStream(), and SetDefaultBinWidth().

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

src/stats/model/histogram.h
src/stats/model/histogram.cc

Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Histogram() [1/2]

◆ Histogram() [2/2]

Member Function Documentation

◆ AddValue()

◆ Clear()

◆ GetBinCount()

◆ GetBinEnd()

◆ GetBinStart()

◆ GetBinWidth()

◆ GetNBins()

◆ SerializeToXmlStream()

◆ SetDefaultBinWidth()

Member Data Documentation

◆ m_binWidth

◆ m_histogram