kcl.waterloo.graphics.transforms

Class PTransform

java.lang.Object

kcl.waterloo.graphics.transforms.GJAbstractDataTransform

kcl.waterloo.graphics.transforms.PTransform

All Implemented Interfaces:

GJDataTransformInterface

public final class PTransform
extends GJAbstractDataTransform

Field Summary

Fields inherited from class kcl.waterloo.graphics.transforms.GJAbstractDataTransform

nf

Method Summary

Methods

Modifier and Type	Method and Description
java.util.ArrayList<java.lang.Double>	getAxisTickPositions(double start, double stop, double inc)
double	getData(double val) Transforms and returns a single value.
double[]	getData(double[] arr) Transforms and returns an array of values.
static PTransform	getInstance()
double	getInverse(double val) Returns the inverse transform of the specified value.
java.util.ArrayList<java.lang.Double>	getMinorGridPositions(double start, double stop, double inc, int n)
java.lang.String	getName() The name for this transform as a String
java.lang.String	getTickLabel(double val) Returns a String based on the input value which can be used to label the axes.

Methods inherited from class kcl.waterloo.graphics.transforms.GJAbstractDataTransform

getInverse, getNumberFormatter

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static PTransform getInstance()

getName

public java.lang.String getName()

Description copied from interface: GJDataTransformInterface

The name for this transform as a String

Returns:

a name

getData

public final double getData(double val)

Description copied from interface: GJDataTransformInterface

Transforms and returns a single value.

Parameters:

val - the value to transform

Returns:

the transformed value

getData

public final double[] getData(double[] arr)

Description copied from interface: GJDataTransformInterface

Transforms and returns an array of values. Note that, as any concrete implementation can transform the src array by reference, it is recommended that src be a defensive copy of the required input. An output is required for pass-by-value systems like MATLAB

Parameters:

arr - array to transform

Returns:

a tranformed array that may be a reference to src or a copy.

getInverse

public final double getInverse(double val)

Description copied from interface: GJDataTransformInterface

Returns the inverse transform of the specified value. Returns Double.NaN if the method is not implemented.

Returns:

a double value

getTickLabel

public final java.lang.String getTickLabel(double val)

Description copied from interface: GJDataTransformInterface

Returns a String based on the input value which can be used to label the axes. The output string can be empty if no label is required

Returns:

an Object

getAxisTickPositions

public java.util.ArrayList<java.lang.Double> getAxisTickPositions(double start,
                                                         double stop,
                                                         double inc)

Parameters:

start - typically the left-hand/bottom of the axis range

stop - typically the right-hand/top of the axis range

inc - distance between major grids

Returns:

values for the major grid positions (already transformed)

getMinorGridPositions

public java.util.ArrayList<java.lang.Double> getMinorGridPositions(double start,
                                                          double stop,
                                                          double inc,
                                                          int n)

n - number of minor grid positions

Returns:

values for the minor grid positions (n-2 entries as the 0th and nth coincide with the major grid). These values should be added to the axis tick positions to get the minor grid positions (already transformed)