simnet
Class Histogram

java.lang.Object
  simnet.Histogram

public class Histogram

extends java.lang.Object

Keeps a histogram about a set of data points, and computes the average and standard deviation of its data points. The first slice is from 1-resolution second slice is from resolution+1 to 2*resolution the n-th slice is from (n-1)*resolution+1 to n*resolution There are seperate statistics for 0 (and less) and greater then resolution*slices

Field Summary

protected int	acc_count
protected long	count_high
protected long	count_low
protected long[]	count_slices
protected long	count_total
static double[]	DEFAULT_ORDER_STATS The default order statistics to compute.
static int	GRAPH_WIDTH The width of all Histograms.
protected long	max_observed
protected double[]	order_stats Which order statistics to estimate
protected java.lang.String	os
protected int	os_idx
protected int	resolution The size of big each "slice".
protected int	slices The number of slices to maintain.
protected double	ss
protected double	sum

Constructor Summary

Histogram(int resolution, int slices)
Create a histogram with the specificed slice resolution and number of slices.

Histogram(int resolution, int slices, double[] order_stats)
Create a histogram with the specificed slice resolution, number of slices, and the specific order statistics specified.

Method Summary

void	clear() Clears this histogram.
protected void	doActualRecord(int stat) The internal function which actually records the given value.
double	getAverage() Returns the average of the data points collected.
long	getCount() Returns the number of data points collected.
protected java.lang.String	getGraphLine(java.lang.String start, java.lang.String stop, long count, long max) Return the output line for the given range with the given count.
double	getStdDev() Returns the (population) standard deviation of the data points collected.
void	record(double stat) Record the specified value (rouned up with Math.ceil).
void	record(int stat) Record the specified value.
java.lang.String	toString() Return the full representation histogram.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

GRAPH_WIDTH

public static final int GRAPH_WIDTH

The width of all Histograms.

See Also:

Constant Field Values

DEFAULT_ORDER_STATS

public static final double[] DEFAULT_ORDER_STATS

The default order statistics to compute.

resolution

protected int resolution

The size of big each "slice".

slices

protected int slices

The number of slices to maintain.

order_stats

protected double[] order_stats

Which order statistics to estimate

count_total

protected long count_total

count_low

protected long count_low

count_slices

protected long[] count_slices

count_high

protected long count_high

max_observed

protected long max_observed

sum

protected double sum

ss

protected double ss

os_idx

protected int os_idx

os

protected java.lang.String os

acc_count

protected int acc_count

Constructor Detail

Histogram

public Histogram(int resolution,
                 int slices)

Create a histogram with the specificed slice resolution and number of slices.

Histogram

public Histogram(int resolution,
                 int slices,
                 double[] order_stats)

Create a histogram with the specificed slice resolution, number of slices, and the specific order statistics specified.

Method Detail

clear

public void clear()

Clears this histogram.

record

public void record(double stat)

Record the specified value (rouned up with Math.ceil).

record

public void record(int stat)

Record the specified value.

doActualRecord

protected void doActualRecord(int stat)

The internal function which actually records the given value.

getGraphLine

protected java.lang.String getGraphLine(java.lang.String start,
                                        java.lang.String stop,
                                        long count,
                                        long max)

Return the output line for the given range with the given count.

toString

public java.lang.String toString()

Return the full representation histogram.

getCount

public long getCount()

Returns the number of data points collected.

getAverage

public double getAverage()

Returns the average of the data points collected.

getStdDev

public double getStdDev()

Returns the (population) standard deviation of the data points collected.