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Represents a point in a JetWeb plot. A data point has the following properties;

• x value
• y value
• y error (up)
• y error (down)
• bin width
• pull (chi2)

Version:

$Date: 2006-06-08 13:12:58 +0100 (Thu, 08 Jun 2006) $ $Revision: 1178 $

Author:

J. Monk from S. Butterworth, UCL.

Constructor Summary

DataPoint()
construct point data from array of doubles

Method Summary

void	add(DataPoint p2) Add another DataPoint to this DataPoint.
java.lang.Object	clone()
void	fixZeroError(double lumi) Set zero errors to upper limits.
double	getBinWidth() binwidth
double	getChi2() Chi squared
double	getX() x co-ordinate
double	getXMax() maximum x value, incorporating bin width
double	getXMin() minimum x value, incorporating bin width
double	getY() y co-ordinate
double	getYDown() error on y co-ordinate (down)
double	getYUp() error on y co-ordinate (up)
DataPoint	setBinWidth(double d) binwidth
DataPoint	setChi2(double d) Chi squared
DataPoint	setX(double d) x co-ordinate
DataPoint	setY(double d) y co-ordinate
DataPoint	setYDown(double d) error on y co-ordinate (down)
DataPoint	setYUp(double d) error on y co-ordinate (up)
double[]	toArray() returns double[6] array of point data point[X] = x value point[Y] = y value point[YUP] = y error (up) point[YDOWN] = y error (down) point[BINWIDTH] = bin width point[CHI2] = pull (chi2)
java.lang.String	toString() Outputs stringified point data

Methods inherited from class java.lang.Object

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

Constructor Detail

DataPoint

public DataPoint()

construct point data from array of doubles

Parameters:

pointArray -

• point[X] = x value
• point[Y] = y value
• point[YUP] = y error (up)
• point[YDOWN] = y error (down)
• point[BINWIDTH] = bin width
• point[CHI2] = pull (chi2)

Throws:

JetWebException

Method Detail

toArray

public double[] toArray()

returns double[6] array of point data

• point[X] = x value
• point[Y] = y value
• point[YUP] = y error (up)
• point[YDOWN] = y error (down)
• point[BINWIDTH] = bin width
• point[CHI2] = pull (chi2)

getX

public double getX()

x co-ordinate

getY

public double getY()

y co-ordinate

getYUp

public double getYUp()

error on y co-ordinate (up)

getYDown

public double getYDown()

error on y co-ordinate (down)

getBinWidth

public double getBinWidth()

binwidth

getChi2

public double getChi2()

Chi squared

setX

public DataPoint setX(double d)

x co-ordinate

setY

public DataPoint setY(double d)

y co-ordinate

setYUp

public DataPoint setYUp(double d)

error on y co-ordinate (up)

setYDown

public DataPoint setYDown(double d)

error on y co-ordinate (down)

setBinWidth

public DataPoint setBinWidth(double d)

binwidth

setChi2

public DataPoint setChi2(double d)

Chi squared

clone

public java.lang.Object clone()

Overrides:

clone in class java.lang.Object

getXMax

public double getXMax()

maximum x value, incorporating bin width

getXMin

public double getXMin()

minimum x value, incorporating bin width

toString

public java.lang.String toString()

Outputs stringified point data

Overrides:

toString in class java.lang.Object

add

public void add(DataPoint p2)

Add another DataPoint to this DataPoint.

• If this point has no data, replace by data in input point.
• If input point has no data, ignore it.
• Otherwise add data and recalculate errors.

Parameters:

p2 - point to add.

fixZeroError

public void fixZeroError(double lumi)

Set zero errors to upper limits. If you can tell the point how much integrated lumi it was generated from, and if the point has a zero value and zero errors, it will set it errors to the 1 sigma upper limit.