weka.knowledgeflow.steps

Class DataVisualizer

java.lang.Object

weka.knowledgeflow.steps.BaseStep

weka.knowledgeflow.steps.DataVisualizer

All Implemented Interfaces:

Serializable, BaseStepExtender, DataCollector, Step

@KFStep(name="DataVisualizer",
        category="Visualization",
        toolTipText="Visualize training/test sets in a 2D scatter plot.",
        iconPath="weka/gui/knowledgeflow/icons/DefaultDataVisualizer.gif")
public class DataVisualizer
extends BaseStep
implements DataCollector

A step that provides a visualization based on weka.gui.visualize.VisualizePanel

Version:

$Revision: $

Author:

Mark Hall (mhall{[at]}pentaho{[dot]}com)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DataVisualizer()

Method Summary

Modifier and Type	Method and Description
void	clearPlotData()
String	getCustomEditorForStep() Return the fully qualified name of a custom editor component (JComponent) to use for editing the properties of the step.
List<String>	getIncomingConnectionTypes() Get a list of incoming connection types that this step can accept.
Map<String,String>	getInteractiveViewers() When running in a graphical execution environment a step can make one or more popup Viewer components available.
String	getOffscreenAdditionalOpts() Get the additional options for the offscreen renderer
String	getOffscreenHeight() Get the height (in pixels) of the offscreen image to generate
String	getOffscreenRendererName() Get the name of the renderer to use for offscreen chart rendering operations
String	getOffscreenWidth() Get the width (in pixels) of the offscreen image to generate.
String	getOffscreenXAxis() Get the name of the attribute for the x-axis in offscreen plots
String	getOffscreenYAxis() Get the name of the attribute for the y-axix of offscreen plots.
List<String>	getOutgoingConnectionTypes() Get a list of outgoing connection types that this step can produce.
List<PlotData2D>	getPlots()
void	processIncoming(Data data) Process an incoming data payload (if the step accepts incoming connections)
void	restoreData(Object data) Set the data for this collector
Object	retrieveData() Get the data that this collector has collected
void	setOffscreenAdditionalOpts(String additional) Set the additional options for the offscreen renderer
void	setOffscreenHeight(String height) Set the height (in pixels) of the offscreen image to generate
void	setOffscreenRendererName(String rendererName) Set the name of the renderer to use for offscreen chart rendering operations
void	setOffscreenWidth(String width) Set the width (in pixels) of the offscreen image to generate.
void	setOffscreenXAxis(String xAxis) Set the name of the attribute for the x-axis in offscreen plots.
void	setOffscreenYAxis(String yAxis) Set the name of the attribute for the y-axis in offscreen plots.
void	stepInit() Initialize the step.

Methods inherited from class weka.knowledgeflow.steps.BaseStep

environmentSubstitute, getDefaultSettings, getInteractiveViewersImpls, getName, getStepManager, globalInfo, isResourceIntensive, isStopRequested, outputStructureForConnectionType, setName, setStepIsResourceIntensive, setStepManager, start, stop

Methods inherited from class java.lang.Object

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

Constructor Detail

DataVisualizer

public DataVisualizer()

Method Detail

setOffscreenXAxis

@OptionMetadata(displayName="X-axis attribute",
                description="Attribute name or /first, /last or /<index>",
                displayOrder=1)
public void setOffscreenXAxis(String xAxis)

Set the name of the attribute for the x-axis in offscreen plots. This defaults to "False Positive Rate" for threshold curves if not specified.

Parameters:

xAxis - the name of the xAxis

getOffscreenXAxis

public String getOffscreenXAxis()

Get the name of the attribute for the x-axis in offscreen plots

Returns:

the name of the xAxis

setOffscreenYAxis

@OptionMetadata(displayName="Y-axis attribute",
                description="Attribute name or /first, /last or /<index>",
                displayOrder=2)
public void setOffscreenYAxis(String yAxis)

Set the name of the attribute for the y-axis in offscreen plots. This defaults to "True Positive Rate" for threshold curves if not specified.

Parameters:

yAxis - the name of the xAxis

getOffscreenYAxis

public String getOffscreenYAxis()

Get the name of the attribute for the y-axix of offscreen plots.

Returns:

the name of the yAxis.

setOffscreenWidth

@OptionMetadata(displayName="Chart width (pixels)",
                description="Width of the rendered chart",
                displayOrder=3)
public void setOffscreenWidth(String width)

Set the width (in pixels) of the offscreen image to generate.

Parameters:

width - the width in pixels.

getOffscreenWidth

public String getOffscreenWidth()

Get the width (in pixels) of the offscreen image to generate.

Returns:

the width in pixels.

setOffscreenHeight

@OptionMetadata(displayName="Chart height (pixels)",
                description="Height of the rendered chart",
                displayOrder=4)
public void setOffscreenHeight(String height)

Set the height (in pixels) of the offscreen image to generate

Parameters:

height - the height in pixels

getOffscreenHeight

public String getOffscreenHeight()

Get the height (in pixels) of the offscreen image to generate

Returns:

the height in pixels

setOffscreenRendererName

@ProgrammaticProperty
public void setOffscreenRendererName(String rendererName)

Set the name of the renderer to use for offscreen chart rendering operations

Parameters:

rendererName - the name of the renderer to use

getOffscreenRendererName

public String getOffscreenRendererName()

Get the name of the renderer to use for offscreen chart rendering operations

Returns:

the name of the renderer to use

setOffscreenAdditionalOpts

@ProgrammaticProperty
public void setOffscreenAdditionalOpts(String additional)

Set the additional options for the offscreen renderer

Parameters:

additional - additional options

getOffscreenAdditionalOpts

public String getOffscreenAdditionalOpts()

Get the additional options for the offscreen renderer

Returns:

the additional options

stepInit

public void stepInit()
              throws WekaException

Description copied from interface: Step

Initialize the step.

Specified by:

stepInit in interface BaseStepExtender

Specified by:

stepInit in interface Step

Throws:

WekaException - if a problem occurs during initialization

processIncoming

public void processIncoming(Data data)
                     throws WekaException

Description copied from class: BaseStep

Process an incoming data payload (if the step accepts incoming connections)

Specified by:

processIncoming in interface BaseStepExtender

Specified by:

processIncoming in interface Step

Overrides:

processIncoming in class BaseStep

Parameters:

data - the payload to process

Throws:

WekaException - if a problem occurs

getPlots

public List<PlotData2D> getPlots()

clearPlotData

public void clearPlotData()

retrieveData

public Object retrieveData()

Description copied from interface: DataCollector

Get the data that this collector has collected

Specified by:

retrieveData in interface DataCollector

Returns:

the data collected by this collector

restoreData

public void restoreData(Object data)
                 throws WekaException

Description copied from interface: DataCollector

Set the data for this collector

Specified by:

restoreData in interface DataCollector

Parameters:

data - the data to set

Throws:

WekaException - if there is a problem restoring data

getIncomingConnectionTypes

public List<String> getIncomingConnectionTypes()

Description copied from interface: Step

Get a list of incoming connection types that this step can accept. Ideally (and if appropriate), this should take into account the state of the step and any existing incoming connections. E.g. a step might be able to accept one (and only one) incoming batch data connection.

Specified by:

getIncomingConnectionTypes in interface BaseStepExtender

Specified by:

getIncomingConnectionTypes in interface Step

Returns:

a list of incoming connections that this step can accept given its current state

getOutgoingConnectionTypes

public List<String> getOutgoingConnectionTypes()

Description copied from interface: Step

Get a list of outgoing connection types that this step can produce. Ideally (and if appropriate), this should take into account the state of the step and the incoming connections. E.g. depending on what incoming connection is present, a step might be able to produce a trainingSet output, a testSet output or neither, but not both.

Specified by:

getOutgoingConnectionTypes in interface BaseStepExtender

Specified by:

getOutgoingConnectionTypes in interface Step

Returns:

a list of outgoing connections that this step can produce

getCustomEditorForStep

public String getCustomEditorForStep()

Description copied from class: BaseStep

Return the fully qualified name of a custom editor component (JComponent) to use for editing the properties of the step. This method can return null, in which case the system will dynamically generate an editor using the GenericObjectEditor

Specified by:

getCustomEditorForStep in interface Step

Overrides:

getCustomEditorForStep in class BaseStep

Returns:

the fully qualified name of a step editor component

getInteractiveViewers

public Map<String,String> getInteractiveViewers()

Description copied from class: BaseStep

When running in a graphical execution environment a step can make one or more popup Viewer components available. These might be used to display results, graphics etc. Returning null indicates that the step has no such additional graphical views. The map returned by this method should be keyed by action name (e.g. "View results"), and values should be fully qualified names of the corresponding StepInteractiveView implementation. Furthermore, the contents of this map can (and should) be dependent on whether a particular viewer should be made available - i.e. if execution hasn't occurred yet, or if a particular incoming connection type is not present, then it might not be possible to view certain results. Viewers can implement StepInteractiveView directly (in which case they need to extends JPanel), or extends the AbstractInteractiveViewer class. The later extends JPanel, uses a BorderLayout, provides a "Close" button and a method to add additional buttons.

Specified by:

getInteractiveViewers in interface Step

Overrides:

getInteractiveViewers in class BaseStep

Returns:

a map of viewer component names, or null if this step has no graphical views