cern.hep.aida.ref

Class Histogram1D

java.lang.Object

cern.hep.aida.ref.Histogram1D

All Implemented Interfaces:

IHistogram, IHistogram1D, java.io.Serializable

public class Histogram1D
extends java.lang.Object
implements IHistogram1D

A reference implementation of hep.aida.IHistogram1D. The goal is to provide a clear implementation rather than the most efficient implementation. However, performance seems fine - filling 1.2 * 10^6 points/sec, both using FixedAxis or VariableAxis.

See Also:

Serialized Form

Field Summary

Fields inherited from interface colt.hep.aida.IHistogram

OVERFLOW, serialVersionUID, UNDERFLOW

Constructor Summary

Constructors

Constructor and Description
Histogram1D(java.lang.String title, double[] edges) Creates a variable-width histogram.
Histogram1D(java.lang.String title, IAxis axis) Creates a histogram with the given axis binning.
Histogram1D(java.lang.String title, int bins, double min, double max) Creates a fixed-width histogram.

Method Summary

Modifier and Type	Method and Description
int	allEntries() Number of all entries in all (both in-range and under/overflow) bins in the histogram.
int	binEntries(int index) Number of entries in the corresponding bin (ie the number of times fill was called for this bin).
double	binError(int index) The error on this bin.
double	binHeight(int index) Total height of the corresponding bin (ie the sum of the weights in this bin).
int	dimensions() Returns 1 for one-dimensional histograms, 2 for two-dimensional histograms, and so on.
int	entries() Number of in-range entries in the histogram.
double	equivalentBinEntries() Number of equivalent entries.
int	extraEntries() Number of under and overflow entries in the histogram.
void	fill(double x) Fill histogram with weight 1.
void	fill(double x, double weight) Fill histogram with specified weight.
double	mean() Returns the mean of the whole histogram as calculated on filling-time.
int[]	minMaxBins() Indexes of the in-range bins containing the smallest and largest binHeight(), respectively.
void	reset() Reset contents; as if just constructed.
double	rms() Returns the rms of the whole histogram as calculated on filling-time.
double	sumAllBinHeights() Sum of all (both in-range and under/overflow) bin heights in the histogram.
double	sumBinHeights() Sum of in-range bin heights in the histogram.
double	sumExtraBinHeights() Sum of under/overflow bin heights in the histogram.
java.lang.String	title() Title of the histogram (will be set only in the constructor).
IAxis	xAxis() Returns the X Axis.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface colt.hep.aida.IHistogram1D

minMaxBins, xAxis

Methods inherited from interface colt.hep.aida.IHistogram

dimensions, entries, extraEntries, sumAllBinHeights, sumBinHeights, sumExtraBinHeights, title

Constructor Detail

Histogram1D

public Histogram1D(java.lang.String title,
                   double[] edges)

Creates a variable-width histogram. Example: edges = (0.2, 1.0, 5.0) yields an axis with 2 in-range bins [0.2,1.0), [1.0,5.0) and 2 extra bins [-inf,0.2), [5.0,inf].

Parameters:

title - The histogram title.

edges - the bin boundaries the axis shall have; must be sorted ascending and must not contain multiple identical elements.

Throws:

java.lang.IllegalArgumentException - if edges.length < 1.

Histogram1D

public Histogram1D(java.lang.String title,
                   int bins,
                   double min,
                   double max)

Creates a fixed-width histogram.

Parameters:

title - The histogram title.

bins - The number of bins.

min - The minimum value on the X axis.

max - The maximum value on the X axis.

Histogram1D

public Histogram1D(java.lang.String title,
                   IAxis axis)

Creates a histogram with the given axis binning.

Parameters:

title - The histogram title.

axis - The axis description to be used for binning.

Method Detail

allEntries

public int allEntries()

Description copied from interface: IHistogram

Number of all entries in all (both in-range and under/overflow) bins in the histogram.

Specified by:

allEntries in interface IHistogram

binEntries

public int binEntries(int index)

Description copied from interface: IHistogram1D

Number of entries in the corresponding bin (ie the number of times fill was called for this bin).

Specified by:

binEntries in interface IHistogram1D

Parameters:

index - the bin number (0...N-1) or OVERFLOW or UNDERFLOW.

binError

public double binError(int index)

Description copied from interface: IHistogram1D

The error on this bin.

Specified by:

binError in interface IHistogram1D

Parameters:

index - the bin number (0...N-1) or OVERFLOW or UNDERFLOW.

binHeight

public double binHeight(int index)

Description copied from interface: IHistogram1D

Total height of the corresponding bin (ie the sum of the weights in this bin).

Specified by:

binHeight in interface IHistogram1D

Parameters:

index - the bin number (0...N-1) or OVERFLOW or UNDERFLOW.

equivalentBinEntries

public double equivalentBinEntries()

Description copied from interface: IHistogram

Number of equivalent entries.

Specified by:

equivalentBinEntries in interface IHistogram

Returns:

SUM[ weight ] ^ 2 / SUM[ weight^2 ].

fill

public void fill(double x)

Description copied from interface: IHistogram1D

Fill histogram with weight 1.

Specified by:

fill in interface IHistogram1D

fill

public void fill(double x,
                 double weight)

Description copied from interface: IHistogram1D

Fill histogram with specified weight.

Specified by:

fill in interface IHistogram1D

mean

public double mean()

Description copied from interface: IHistogram1D

Returns the mean of the whole histogram as calculated on filling-time.

Specified by:

mean in interface IHistogram1D

reset

public void reset()

Description copied from interface: IHistogram

Reset contents; as if just constructed.

Specified by:

reset in interface IHistogram

rms

public double rms()

Description copied from interface: IHistogram1D

Returns the rms of the whole histogram as calculated on filling-time.

Specified by:

rms in interface IHistogram1D

dimensions

public int dimensions()

Description copied from interface: IHistogram

Returns 1 for one-dimensional histograms, 2 for two-dimensional histograms, and so on.

Specified by:

dimensions in interface IHistogram

entries

public int entries()

Description copied from interface: IHistogram

Number of in-range entries in the histogram.

Specified by:

entries in interface IHistogram

extraEntries

public int extraEntries()

Description copied from interface: IHistogram

Number of under and overflow entries in the histogram.

Specified by:

extraEntries in interface IHistogram

minMaxBins

public int[] minMaxBins()

Description copied from interface: IHistogram1D

Indexes of the in-range bins containing the smallest and largest binHeight(), respectively.

Specified by:

minMaxBins in interface IHistogram1D

Returns:

{minBin,maxBin}.

sumAllBinHeights

public double sumAllBinHeights()

Description copied from interface: IHistogram

Sum of all (both in-range and under/overflow) bin heights in the histogram.

Specified by:

sumAllBinHeights in interface IHistogram

sumBinHeights

public double sumBinHeights()

Description copied from interface: IHistogram

Sum of in-range bin heights in the histogram.

Specified by:

sumBinHeights in interface IHistogram

sumExtraBinHeights

public double sumExtraBinHeights()

Description copied from interface: IHistogram

Sum of under/overflow bin heights in the histogram.

Specified by:

sumExtraBinHeights in interface IHistogram

xAxis

public IAxis xAxis()

Description copied from interface: IHistogram1D

Returns the X Axis.

Specified by:

xAxis in interface IHistogram1D

title

public java.lang.String title()

Description copied from interface: IHistogram

Title of the histogram (will be set only in the constructor).

Specified by:

title in interface IHistogram