LogAxis

Paquete	mx.charts
Clase	public class LogAxis
Herencia	LogAxis NumericAxis AxisBase EventDispatcher Object

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

The LogAxis class maps numeric values logarithmically between a minimum and maximum value along a chart axis. By default, it determines minimum, maximum, and interval values from the charting data to fit all of the chart elements on the screen. You can also explicitly set specific values for these properties. A LogAxis object cannot correctly render negative values, as Log10() of a negative number is undefined.

Sintaxis MXML expanded

Ocultar sintaxis MXML

The <mx:LogAxis> tag inherits all the properties of its parent classes and adds the following properties:

  <mx:LogAxis
    Properties
    interval="10"
    maximum="null"
    maximumLabelPrecision="null"
    minimum="null"
  />

Ver los ejemplos

Más ejemplos

About the axis classes
About the LogAxis subclass
Adding axis titles
Defining axis labels

Elementos de API relacionados

mx.charts.chartClasses.IAxis

Propiedades públicas

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	Propiedad		Definido por
		autoAdjust : Boolean Specifies whether Flex rounds values.	NumericAxis
		baseAtZero : Boolean Specifies whether Flex tries to keep the minimum and maximum values rooted at zero.	NumericAxis
		baseline : Number [solo lectura] The computed minimum value for the axis as long as this value is greater than 0.	NumericAxis
		chartDataProvider : Object [solo escritura] The data provider assigned to the enclosing chart.	AxisBase
		computedMaximum : Number The computed maximum value represented by this axis.	NumericAxis
		computedMinimum : Number The computed minimum value represented by this axis.	NumericAxis
		constructor : Object Una referencia a la clase de objeto o función constructora para una instancia de objeto determinada.	Object
		direction : String Determines the direction in which the axis is rendered.	NumericAxis
		displayName : String The name of the axis.	AxisBase
		interval : Number Specifies the multiplier label values along the axis.	LogAxis
		labelFunction : Function Called to format axis values for display as labels.	NumericAxis
		maximum : Number Specifies the maximum value for an axis label.	LogAxis
		maximumLabelPrecision : Number Specifies the maximum number of decimal places for representing fractional values on the labels generated by this axis.	LogAxis
		minimum : Number Specifies the minimum value for an axis label.	LogAxis
		minorTicks : Array [solo lectura] An Array of minor tick marks generated to represent this axis.	NumericAxis
		padding : Number Specifies padding that Flex adds to the calculated minimum and maximum values for the axis when rendering the values on the screen.	NumericAxis
		parseFunction : Function Specify a parseFunction to customize how the values rendered by your chart are converted into numeric values.	NumericAxis
		title : String The text for the title displayed along the axis.	AxisBase
		unitSize : Number [solo lectura] The size of one unit of data as represented by this axis.	AxisBase

Propiedades protegidas

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	Propiedad		Definido por
		assignedMaximum : Number The explicitly assigned maximum value.	NumericAxis
		assignedMinimum : Number The explicitly assigned minimum value.	NumericAxis
		computedInterval : Number The computed interval represented by this axis.	NumericAxis
		dataDescriptions : Array [solo lectura] An Array of DataDescription structures describing the data being represented by the chart.	NumericAxis
		labelCache : Array The most recent set of AxisLabel objects generated to represent this axis.	NumericAxis
		labelMaximum : Number The maximum value where a label should be placed.	NumericAxis
		labelMinimum : Number The minimum value where a label should be placed.	NumericAxis
		minorTickCache : Array The most recent set of minor tick marks generated to represent this axis.	NumericAxis
		requiredDescribedFields : uint [solo lectura] The fields of the DescribeData structure that this axis is interested in.	NumericAxis
		ticks : Array [solo lectura] An Array of tick marks for this axis.	NumericAxis

Métodos públicos

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	Método		Definido por
		LogAxis() Constructor.	LogAxis
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void Registra un objeto de detector de eventos con un objeto EventDispatcher, de modo que el detector reciba la notificación de un evento.	EventDispatcher
		dataChanged():void Triggers events that inform the range object when the chart data has changed.	AxisBase
		dispatchEvent(event:Event):Boolean Distribuye un evento en el flujo del evento.	EventDispatcher
		filterCache(cache:Array, field:String, filteredField:String):void Filters a set of values of arbitrary type to a set of numbers that can be mapped.	NumericAxis
		formatForScreen(value:Object):String Formats values for display in DataTips.	NumericAxis
		getLabelEstimate():AxisLabelSet Determines the range to estimate what the axis labels should be.	NumericAxis
		getLabels(minimumAxisLength:Number):AxisLabelSet Gets the labels text that is rendered.	NumericAxis
		hasEventListener(type:String):Boolean Comprueba si el objeto EventDispatcher tiene detectores registrados para un tipo concreto de evento.	EventDispatcher
		hasOwnProperty(name:String):Boolean Indica si un objeto tiene definida una propiedad especificada.	Object
		invertTransform(value:Number):Object Maps a position along the axis back to a numeric data value.	NumericAxis
		isPrototypeOf(theClass:Object):Boolean Indica si hay una instancia de la clase Object en la cadena de prototipo del objeto especificado como parámetro.	Object
		mapCache(cache:Array, field:String, convertedField:String, indexValues:Boolean = false):void Converts a set of values of arbitrary type to a set of numbers that can be transformed into screen coordinates.	NumericAxis
		preferDropLabels():Boolean Determines how the axis handles overlapping labels.	NumericAxis
		propertyIsEnumerable(name:String):Boolean Indica si existe la propiedad especificada y si es enumerable.	Object
		reduceLabels(intervalStart:AxisLabel, intervalEnd:AxisLabel):AxisLabelSet Invoked when an AxisRenderer is unable to cleanly render the labels without overlap, and would like the Axis object to reduce the set of labels.	NumericAxis
		registerDataTransform(transform:mx.charts.chartClasses:DataTransform, dimensionName:String):void Each DataTransform that makes use of an axis registers itself with that axis.	AxisBase
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Elimina un detector del objeto EventDispatcher.	EventDispatcher
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Establece la disponibilidad de una propiedad dinámica para operaciones de bucle.	Object
		toLocaleString():String Devuelve la representación de cadena de este objeto, con formato según las convenciones específicas de configuración regional.	Object
		toString():String Devuelve la representación de cadena del objeto especificado.	Object
		transformCache(cache:Array, field:String, convertedField:String):void Maps a set of values from data space to screen space.	NumericAxis
		unregisterDataTransform(transform:mx.charts.chartClasses:DataTransform):void Each DataTransform that makes use of an axis registers itself with that axis.	AxisBase
		update():void Updates the chart.	NumericAxis
		valueOf():Object Devuelve el valor simple del objeto especificado.	Object
		willTrigger(type:String):Boolean Comprueba si hay registrado un detector de eventos con este objeto EventDispatcher o con cualquiera de sus ascendientes para el tipo de evento concreto.	EventDispatcher

Métodos protegidos

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	Método		Definido por
		adjustMinMax(minValue:Number, maxValue:Number):void Adjusts the generated or assigned range of the axis's labels.	NumericAxis
		buildLabelCache():Boolean Populates the labelCache property with labels representing the current values of the axis.	NumericAxis
		buildMinorTickCache():Array Builds an Array of positions for the minor tick marks Array that is generated by this axis.	NumericAxis
		describeData(requiredFields:uint):Array Called by the governing DataTransform to obtain a description of the data represented by this IChartElement.	AxisBase
		guardMinMax(min:Number, max:Number):Array Protects the range against invalid values for this axis type.	NumericAxis
		invalidateCache():void Invalidates the cached labels and tick marks that represent this axis's values.	NumericAxis

Eventos

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	Evento		Resumen	Definido por
		activate	[evento broadcast] Se distribuye cuando Flash Player o AIR pasan a estar activos.	EventDispatcher
		deactivate	[evento broadcast] Se distribuye cuando Flash Player o de AIR pasan a estar inactivos.	EventDispatcher

Información sobre propiedades

interval

propiedad

interval:Number

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Specifies the multiplier label values along the axis. A value of 10 generates labels at 1, 10, 100, 1000, etc., while a value of 100 generates labels at 1, 100, 10000, etc. Flex calculates the interval if this property is set to NaN. Intervals must be even powers of 10, and must be greater than or equal to 10. The LogAxis rounds the interval down to an even power of 10, if necessary.

El valor predeterminado es 10.

Implementación
public function get interval():Number
public function set interval(value:Number):void

maximum

propiedad

maximum:Number

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Specifies the maximum value for an axis label. If NaN, Flex determines the maximum value from the data in the chart. The maximum value must be an even power of 10. The LogAxis rounds an explicit maximum value up to an even power of 10, if necessary.

El valor predeterminado es NaN.

Implementación
public function get maximum():Number
public function set maximum(value:Number):void

maximumLabelPrecision

propiedad

maximumLabelPrecision:Number

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Specifies the maximum number of decimal places for representing fractional values on the labels generated by this axis. By default, the Axis autogenerates this value from the labels themselves. A value of 0 round to the nearest integer value, while a value of 2 rounds to the nearest 1/100th of a value.

Implementación
public function get maximumLabelPrecision():Number
public function set maximumLabelPrecision(value:Number):void

minimum

propiedad

minimum:Number

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Specifies the minimum value for an axis label. If NaN, Flex determines the minimum value from the data in the chart. The minimum value must be an even power of 10. The LogAxis will round an explicit minimum value downward to an even power of 10 if necessary.

El valor predeterminado es NaN.

Implementación
public function get minimum():Number
public function set minimum(value:Number):void

Información sobre constructores

()

Información sobre

public function LogAxis()

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Constructor.

Ejemplos Cómo utilizar este ejemplo

LogAxisExample.mxml

<?xml version="1.0"?>
<!-- Simple example to demonstrate the LogAxis class. -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
    xmlns:s="library://ns.adobe.com/flex/spark" 
    xmlns:mx="library://ns.adobe.com/flex/mx">

    <fx:Script>
        <![CDATA[

        import mx.collections.ArrayCollection;

        [Bindable]
        private var expensesAC:ArrayCollection = new ArrayCollection( [
            { Month: "Jan", Profit: 20000, Expenses: 1500, Amount: 450 },
            { Month: "Feb", Profit: 1000, Expenses: 15000, Amount: 600 },
            { Month: "Mar", Profit: 15000, Expenses: 5000, Amount: 300 },
            { Month: "Apr", Profit: 1800, Expenses: 1200, Amount: 900 },
            { Month: "May", Profit: 2400, Expenses: 575, Amount: 500 } ]);
        ]]>
    </fx:Script>

    <mx:Panel title="LogAxis Example" height="100%" width="100%">

        <mx:LineChart id="linechart" height="100%" width="100%"
            paddingLeft="5" paddingRight="5" 
            showDataTips="true" dataProvider="{expensesAC}">
                
            <mx:horizontalAxis>
                <mx:CategoryAxis categoryField="Month"/>
            </mx:horizontalAxis>
                
            <mx:verticalAxis>
                <mx:LogAxis interval="10"/>
            </mx:verticalAxis>
                
            <mx:series>
                <mx:LineSeries yField="Profit" form="curve" displayName="Profit"/>
                <mx:LineSeries yField="Expenses" form="curve" displayName="Expenses"/>
                <mx:LineSeries yField="Amount" form="curve" displayName="Amount"/>
            </mx:series>
        </mx:LineChart>

        <mx:Legend dataProvider="{linechart}"/>

    </mx:Panel>
</s:Application>

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LogAxis - AS3 Flex

Clases x

interval

maximum

maximumLabelPrecision

minimum

LogAxis