org.faceless.graph.math
Class DataCurve

java.lang.Object
  org.faceless.graph.math.Curve
      org.faceless.graph.math.DataCurve

public class DataCurve
extends Curve

A type of curve that represents data samples. If you're plotting data on a LineGraph then this the Curve you need to use.

DataCurve

public DataCurve()

getMin

public double getMin()

Description copied from class: Curve

Return the minimum value that is defined for this curve. For curves with no minimum (like most mathematical functions), this should return Double.POSITIVE_INFINITY (yes, positive)

Specified by:

getMin in class Curve

getMax

public double getMax()

Description copied from class: Curve

Return the maximum value that is defined for this curve. For curves with no maximum (like most mathematical functions), this should return Double.NEGATIVE_INFINITY (yes, negative)

Specified by:

getMax in class Curve

point

public boolean point(double x)

Description copied from class: Curve

If a marker is to be placed at this point on the curve then return true, otherwise return false. Most FunctionCurve will return false, but curves that have been fitted to a DataCurve may return any points from that DataCurve that are matched exactly by the fitted curve.

Specified by:

point in class Curve

set

public void set(double x,
                double y)

Set the value of the curve at a specific value

Parameters:

x - The X position on the curve

y - The value of the curve at this position

getForFit

public double[][] getForFit()

Return the data in the curve in a form that can be used by another curve - usually to fit a smoother curve to the samples.

Returns an array of doubles that's 2xN, where N is the number of data samples. The first column is the X values, the second column the Y values.

get

public double get(double x)

Description copied from class: Curve

Return the value of this curve at the specified X position. If the curve has no value at this point (i.e. x<curve min or x>curve max) return Double.NaN

Specified by:

get in class Curve

steps

public double[] steps()

Description copied from class: Curve

Return the points on the curve that it should be sampled at to get an accurate picture of it. Subclasses of FunctionCurve may return an empty list if they wish, or if there are certain points that the curve must be sampled at, it can return them here.

Specified by:

steps in class Curve

toString

public String toString()

Overrides:

toString in class Object