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Class EDU.emporia.mathtools.PiecewiseLinearFunction

Object
   |
   +----MathFunction
           |
           +----EDU.emporia.mathtools.PiecewiseLinearFunction

public class PiecewiseLinearFunction

extends MathFunction

Version:

1.0

Author:

Joe Yanik

Since:

6/4/2001

points

The Vector that will contain the points used to define the function.

EDU.emporia.mathtools.PiecewiseLinearFunction()

EDU.emporia.mathtools.PiecewiseLinearFunction(Point2D.Double[])

addPoint(Point2D.Double)

Adds the indicated point to the list of points used to construct the function.

addPoint(double, double)

Adds the point with the specified x and y coordinate.

addPoints(Point2D.Double[])

Adds the indicate array of points to the ones that are being used to define the function.

functionValue(double)

Overrides the functionValue method of the MathFunction class.

getPoints()

Gets the array of points that are being used to define the function.

removeAllPoints()

Removes all points from the list of points that are used to define the function.

removePoint(Point2D.Double)

Removes the indicated point from the list of points that are being used to define the function

removePoint(double, double)

Removes the point with the indicated x and y coordinate from the list of points that are used to define the functoin

removePoint()

Removes the point with the largest x coordinate

protected java.util.Vector points

The Vector that will contain the points used to define the function. They will always be listed in increasing order of x-value.

public PiecewiseLinearFunction()

public PiecewiseLinearFunction(EDU.emporia.mathtools.Point2D.Double[] p)

public void addPoint(EDU.emporia.mathtools.Point2D.Double p) throws IllegalPointError

Adds the indicated point to the list of points used to construct the function. The function will then pass through the specified point. It will through an exception if there is already a point with that x-coordinate.

Parameters:

p - The point to be added.

Throws: IllegalPointError

public void addPoint(double x,
                     double y) throws IllegalPointError

Adds the point with the specified x and y coordinate. It throws an IllegalPointError if there is already a point with the given x-coordinate.

Parameters:

x - The x-coordinate of the point to be added

y - The y-coordinate of the point to be added.

Throws: IllegalPointError

This will be thrown is there is an attempt to add a point with the same x coordinate as one that is already being used.

public void addPoints(EDU.emporia.mathtools.Point2D.Double[] p) throws IllegalPointError

Adds the indicate array of points to the ones that are being used to define the function. If any of the points contains an x-value that is already being used it will throw and IllegalPointError.

Parameters:

p - The array of points to be added.

Throws: IllegalPointError

Thrown is there is a duplicate x-value.

public double functionValue(double u)

Overrides the functionValue method of the MathFunction class. This method returns the value of the function at the specified x-coordinate

Parameters:

u - The x-coordinate

Returns:

f(x)

Overrides:

functionValue in class MathFunction

public EDU.emporia.mathtools.Point2D.Double[] getPoints()

Gets the array of points that are being used to define the function.

Returns:

The array of points

public void removeAllPoints()

Removes all points from the list of points that are used to define the function.

public void removePoint(EDU.emporia.mathtools.Point2D.Double p)

Removes the indicated point from the list of points that are being used to define the function

Parameters:

p - The point to be removed.

public void removePoint(double x,
                        double y)

Removes the point with the indicated x and y coordinate from the list of points that are used to define the functoin

Parameters:

x - The x-coordinate of the point to be removed.

y - The y-coordinate of the point to be removed.

public void removePoint()

Removes the point with the largest x coordinate

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