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## hep.aida.ref
Class Histogram1D

    java.lang.Object
      hep.aida.ref.Histogram
          hep.aida.ref.AbstractHistogram1D
              hep.aida.ref.Histogram1D

All Implemented Interfaces:
  IHistogram, IHistogram1D, Serializable

public class Histogram1D
extends hep.aida.ref.AbstractHistogram1D
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.

Version:
  1.0, 23/03/2000
See Also:
  Serialized Form

Field Summary

Fields inherited from interface hep.aida.IHistogram
`OVERFLOW, serialVersionUID, UNDERFLOW`

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

Method Summary
`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.
`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 hep.aida.IHistogram1D
`minMaxBins, xAxis`

Methods inherited from interface hep.aida.IHistogram
`dimensions, entries, extraEntries, sumAllBinHeights, sumBinHeights, sumExtraBinHeights, title`

Constructor Detail

### Histogram1D

    public Histogram1D(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:
  `IllegalArgumentException` - if `edges.length < 1`.

### Histogram1D

    public Histogram1D(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(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 String title()

  Description copied from interface: `IHistogram`
  Title of the histogram (will be set only in the constructor).

  Specified by:
    `title` in interface `IHistogram`

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