com.jidesoft.chart.fit
Class FunctionMap

java.lang.Object
  com.jidesoft.chart.fit.FunctionMap

public class FunctionMap
extends Object

The idea is to provide a class that, given a chart model and an x or y value, can read off the corresponding value from the other axis. This assumes straight lines to join up consecutive points in the chart model.

Constructor Summary

FunctionMap()

Method Summary

static double	getXApproximately(ChartModel model, double yIn) Returns the first point at which the line x = xIn crosses any of the line segments joining consecutive points of the chart model
static List<Double>	getXsApproximately(ChartModel model, double yIn) Returns the first point at which the line x = xIn crosses any of the line segments joining consecutive points of the chart model
static double	getYApproximately(ChartModel model, double xIn) Returns the first point at which the line x = xIn crosses any of the line segments joining consecutive points of the chart model
static List<Double>	getYsApproximately(ChartModel model, double xIn) Returns all the points at which x = xIn crosses any of the line segments joining consecutive points of the chart model

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionMap

public FunctionMap()

Method Detail

getXApproximately

public static double getXApproximately(ChartModel model,
                                       double yIn)
                                throws ChartException

Returns the first point at which the line x = xIn crosses any of the line segments joining consecutive points of the chart model

Parameters:

model - the ChartModel of interest

yIn - the supplied y value

Returns:

the approximate X value corresponding to the supplied Y value

Throws:

ChartException

getXsApproximately

public static List<Double> getXsApproximately(ChartModel model,
                                              double yIn)
                                       throws BelowBoundsException,
                                              AboveBoundsException

Returns the first point at which the line x = xIn crosses any of the line segments joining consecutive points of the chart model

Parameters:

model - the model in which we are finding x values

yIn - the y value of interest

Returns:

the approximate X values corresponding to the given y value

Throws:

BelowBoundsException

AboveBoundsException

getYsApproximately

public static List<Double> getYsApproximately(ChartModel model,
                                              double xIn)
                                       throws BelowBoundsException,
                                              AboveBoundsException

Returns all the points at which x = xIn crosses any of the line segments joining consecutive points of the chart model

Parameters:

model - the chart model in which we are finding y values

xIn - the x value of interest

Returns:

the approximate y values corresponding to the given x value

Throws:

BelowBoundsException

AboveBoundsException

getYApproximately

public static double getYApproximately(ChartModel model,
                                       double xIn)
                                throws ChartException

Returns the first point at which the line x = xIn crosses any of the line segments joining consecutive points of the chart model

Parameters:

model - the chart model in which we are finding a y value

xIn - the x value of interest

Returns:

the approximate Y value corresponding to the supplied x value

Throws:

BelowBoundsException

AboveBoundsException

ChartException