Colt 1.2.0

## hep.aida.ref
Class Histogram2D

    java.lang.Object
      hep.aida.ref.Histogram2D

All Implemented Interfaces:
  IHistogram, IHistogram2D, java.io.Serializable

    public class Histogram2D

extends java.lang.Object
implements IHistogram2D

A reference implementation of hep.aida.IHistogram2D. The goal is to provide a clear implementation rather than the most efficient implementation. However, performance seems fine - filling 6 * 10^5 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
`Histogram2D(java.lang.String title, double[] xEdges, double[] yEdges)` Creates a variable-width histogram.
`Histogram2D(java.lang.String title, IAxis xAxis, IAxis yAxis)` Creates a histogram with the given axis binning.
`Histogram2D(java.lang.String title, int xBins, double xMin, double xMax, int yBins, double yMin, double yMax)` 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 indexX, int indexY)` The number of entries (ie the number of times fill was called for this bin).
`int` `binEntriesX(int indexX)` Equivalent to `projectionX().binEntries(indexX)`.
`int` `binEntriesY(int indexY)` Equivalent to `projectionY().binEntries(indexY)`.
`double` `binError(int indexX, int indexY)` The error on this bin.
`double` `binHeight(int indexX, int indexY)` Total height of the corresponding bin (ie the sum of the weights in this bin).
`double` `binHeightX(int indexX)` Equivalent to `projectionX().binHeight(indexX)`.
`double` `binHeightY(int indexY)` Equivalent to `projectionY().binHeight(indexY)`.
`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, double y)` Fill the histogram with weight 1.
`void` `fill(double x, double y, double weight)` Fill the histogram with specified weight.
`double` `meanX()` Returns the mean of the histogram, as calculated on filling-time projected on the X axis.
`double` `meanY()` Returns the mean of the histogram, as calculated on filling-time projected on the Y axis.
`int[]` `minMaxBins()` Indexes of the in-range bins containing the smallest and largest binHeight(), respectively.
`IHistogram1D` `projectionX()` Create a projection parallel to the X axis.
`IHistogram1D` `projectionY()` Create a projection parallel to the Y axis.
`void` `reset()` Reset contents; as if just constructed.
`double` `rmsX()` Returns the rms of the histogram as calculated on filling-time projected on the X axis.
`double` `rmsY()` Returns the rms of the histogram as calculated on filling-time projected on the Y axis.
`IHistogram1D` `sliceX(int indexY)` Slice parallel to the Y axis at bin indexY and one bin wide.
`IHistogram1D` `sliceX(int indexY1, int indexY2)` Create a slice parallel to the axis X axis, between "indexY1" and "indexY2" (inclusive).
`IHistogram1D` `sliceY(int indexX)` Slice parallel to the X axis at bin indexX and one bin wide.
`IHistogram1D` `sliceY(int indexX1, int indexX2)` Create a slice parallel to the axis Y axis, between "indexX1" and "indexX2" (inclusive) The returned IHistogram1D represents an instantaneous snapshot of the histogram at the time the slice was created.
`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()` Return the X axis.
`IAxis` `yAxis()` Return the Y axis.

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Methods inherited from interface hep.aida.IHistogram2D
`binEntriesX, binEntriesY, binHeightX, binHeightY, minMaxBins, projectionX, projectionY, sliceX, sliceX, sliceY, sliceY, xAxis, yAxis`

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

Constructor Detail

### Histogram2D

    public Histogram2D(java.lang.String title,
                       double[] xEdges,
                       double[] yEdges)

  Creates a variable-width histogram. Example: `xEdges = (0.2, 1.0, 5.0, 6.0), yEdges = (-5, 0, 7)` yields 3*2 in-range bins.

  Parameters:
    `title` - The histogram title.
    `xEdges` - the bin boundaries the x-axis shall have; must be sorted ascending and must not contain multiple identical elements.
    `yEdges` - the bin boundaries the y-axis shall have; must be sorted ascending and must not contain multiple identical elements.
  Throws:
    `java.lang.IllegalArgumentException` - if `xEdges.length < 1 || yEdges.length < 1`.

### Histogram2D

    public Histogram2D(java.lang.String title,
                       int xBins,
                       double xMin,
                       double xMax,
                       int yBins,
                       double yMin,
                       double yMax)

  Creates a fixed-width histogram.

  Parameters:
    `title` - The histogram title.
    `xBins` - The number of bins on the X axis.
    `xMin` - The minimum value on the X axis.
    `xMax` - The maximum value on the X axis.
    `yBins` - The number of bins on the Y axis.
    `yMin` - The minimum value on the Y axis.
    `yMax` - The maximum value on the Y axis.

### Histogram2D

    public Histogram2D(java.lang.String title,
                       IAxis xAxis,
                       IAxis yAxis)

  Creates a histogram with the given axis binning.

  Parameters:
    `title` - The histogram title.
    `xAxis` - The x-axis description to be used for binning.
    `yAxis` - The y-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 indexX,
                          int indexY)

  Description copied from interface: `IHistogram2D`
  The number of entries (ie the number of times fill was called for this bin).

  Specified by:
    `binEntries` in interface `IHistogram2D`
  Parameters:
    `indexX` - the x bin number (0...Nx-1) or OVERFLOW or UNDERFLOW.
    `indexY` - the y bin number (0...Ny-1) or OVERFLOW or UNDERFLOW.

### binError

    public double binError(int indexX,
                           int indexY)

  Description copied from interface: `IHistogram2D`
  The error on this bin.

  Specified by:
    `binError` in interface `IHistogram2D`
  Parameters:
    `indexX` - the x bin number (0...Nx-1) or OVERFLOW or UNDERFLOW.
    `indexY` - the y bin number (0...Ny-1) or OVERFLOW or UNDERFLOW.

### binHeight

    public double binHeight(int indexX,
                            int indexY)

  Description copied from interface: `IHistogram2D`
  Total height of the corresponding bin (ie the sum of the weights in this bin).

  Specified by:
    `binHeight` in interface `IHistogram2D`
  Parameters:
    `indexX` - the x bin number (0...Nx-1) or OVERFLOW or UNDERFLOW.
    `indexY` - the y bin number (0...Ny-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,
                     double y)

  Description copied from interface: `IHistogram2D`
  Fill the histogram with weight 1.

  Specified by:
    `fill` in interface `IHistogram2D`

### fill

    public void fill(double x,
                     double y,
                     double weight)

  Description copied from interface: `IHistogram2D`
  Fill the histogram with specified weight.

  Specified by:
    `fill` in interface `IHistogram2D`

### meanX

    public double meanX()

  Description copied from interface: `IHistogram2D`
  Returns the mean of the histogram, as calculated on filling-time projected on the X axis.

  Specified by:
    `meanX` in interface `IHistogram2D`

### meanY

    public double meanY()

  Description copied from interface: `IHistogram2D`
  Returns the mean of the histogram, as calculated on filling-time projected on the Y axis.

  Specified by:
    `meanY` in interface `IHistogram2D`

### reset

    public void reset()

  Description copied from interface: `IHistogram`
  Reset contents; as if just constructed.

  Specified by:
    `reset` in interface `IHistogram`

### rmsX

    public double rmsX()

  Description copied from interface: `IHistogram2D`
  Returns the rms of the histogram as calculated on filling-time projected on the X axis.

  Specified by:
    `rmsX` in interface `IHistogram2D`

### rmsY

    public double rmsY()

  Description copied from interface: `IHistogram2D`
  Returns the rms of the histogram as calculated on filling-time projected on the Y axis.

  Specified by:
    `rmsY` in interface `IHistogram2D`

### 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`

### binEntriesX

    public int binEntriesX(int indexX)

  Description copied from interface: `IHistogram2D`
  Equivalent to `projectionX().binEntries(indexX)`.

  Specified by:
    `binEntriesX` in interface `IHistogram2D`

### binEntriesY

    public int binEntriesY(int indexY)

  Description copied from interface: `IHistogram2D`
  Equivalent to `projectionY().binEntries(indexY)`.

  Specified by:
    `binEntriesY` in interface `IHistogram2D`

### binHeightX

    public double binHeightX(int indexX)

  Description copied from interface: `IHistogram2D`
  Equivalent to `projectionX().binHeight(indexX)`.

  Specified by:
    `binHeightX` in interface `IHistogram2D`

### binHeightY

    public double binHeightY(int indexY)

  Description copied from interface: `IHistogram2D`
  Equivalent to `projectionY().binHeight(indexY)`.

  Specified by:
    `binHeightY` in interface `IHistogram2D`

### 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: `IHistogram2D`
  Indexes of the in-range bins containing the smallest and largest binHeight(), respectively.

  Specified by:
    `minMaxBins` in interface `IHistogram2D`
  Returns:
    `{minBinX,minBinY, maxBinX,maxBinY}`.

### projectionX

    public IHistogram1D projectionX()

  Description copied from interface: `IHistogram2D`
  Create a projection parallel to the X axis. Equivalent to `sliceX(UNDERFLOW,OVERFLOW)`.

  Specified by:
    `projectionX` in interface `IHistogram2D`

### projectionY

    public IHistogram1D projectionY()

  Description copied from interface: `IHistogram2D`
  Create a projection parallel to the Y axis. Equivalent to `sliceY(UNDERFLOW,OVERFLOW)`.

  Specified by:
    `projectionY` in interface `IHistogram2D`

### sliceX

    public IHistogram1D sliceX(int indexY)

  Description copied from interface: `IHistogram2D`
  Slice parallel to the Y axis at bin indexY and one bin wide. Equivalent to `sliceX(indexY,indexY)`.

  Specified by:
    `sliceX` in interface `IHistogram2D`

### sliceX

    public IHistogram1D sliceX(int indexY1,
                               int indexY2)

  Description copied from interface: `IHistogram2D`
  Create a slice parallel to the axis X axis, between "indexY1" and "indexY2" (inclusive). The returned IHistogram1D represents an instantaneous snapshot of the histogram at the time the slice was created.

  Specified by:
    `sliceX` in interface `IHistogram2D`

### sliceY

    public IHistogram1D sliceY(int indexX)

  Description copied from interface: `IHistogram2D`
  Slice parallel to the X axis at bin indexX and one bin wide. Equivalent to `sliceY(indexX,indexX)`.

  Specified by:
    `sliceY` in interface `IHistogram2D`

### sliceY

    public IHistogram1D sliceY(int indexX1,
                               int indexX2)

  Description copied from interface: `IHistogram2D`
  Create a slice parallel to the axis Y axis, between "indexX1" and "indexX2" (inclusive) The returned IHistogram1D represents an instantaneous snapshot of the histogram at the time the slice was created.

  Specified by:
    `sliceY` in interface `IHistogram2D`

### 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: `IHistogram2D`
  Return the X axis.

  Specified by:
    `xAxis` in interface `IHistogram2D`

### yAxis

    public IAxis yAxis()

  Description copied from interface: `IHistogram2D`
  Return the Y axis.

  Specified by:
    `yAxis` in interface `IHistogram2D`

### 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`

Colt 1.2.0

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