Change starting and ending the Flex LineChart of JSON data with Slider

My JSON Data file ise data.txt

[ 
    {
        "sayim":"1",
        "x":"400",
        "y":"5",
        "z":"-6"

    },

    {
        "sayim":"2",
        "x":"4",
        "y":"-40",
        "z":"700"
    },

    {
        "sayim":"3",
        "x":"5",
        "y":"-5",
        "z":"500"
    },

    {
        "sayim":"4",
        "x":"1400",
        "y":"50",
        "z":"-6"
    },

    {
        "sayim":"5",
        "x":"4",
        "y":"5",
        "z":"6"
    }
]

and my aim ise to create a Slider which can change starting and ending of the graphic, it is like what is showing in figure 6 in this website

and here the MXML codes;

 .
                            ..
                            ...
                            jsonDataArray = JSON.decode(urlLoader.data);    
            proceed();
            }
         private function proceed():void
            {

                dgg.dataProvider = jsonDataArray;
         开发者_如何学编程   }

        ]]>
    </mx:Script>
<mx:HSlider  minimum="1" maximum="30" id="daySlider" snapInterval="1" thumbCount="2" values="[1,30]" /> 
    <mx:LineChart id="dgg" width="1000" height="500" horizontalCenter="0" > 
        <mx:series> 
    <mx:LineSeries xField="sayim" yField="x" displayName="X Bileşeni" /> 
    <mx:LineSeries xField="sayim" yField="y" displayName="Y Bileşeni" /> 
    <mx:LineSeries xField="sayim" yField="z" displayName="Z Bileşeni" /> 
        </mx:series> 
    </mx:LineChart> 
    <mx:Legend dataProvider="{dgg}" />

The problem is "dataProvider" definition in LineChart, I wrote this code but it is still not working,

dataProvider="{dgg(sayim>=daySlider.values[0] && sayim<=daySlider.values[1])}"

what is the right code to control the LineChart with the Slider.

---

You are mixing your metaphors a bit here.

In that article, he is using EcmaScript For Xml (E4X) to bind an XML query to the dataProvider. The "dots" in that line are very important because it assumes a loose XML tree. It is also using a query syntax on day that can only be done with XML objects. Thus, the following binding only works if the stockData is of the data type XML.

dataProvider="{stockData..day.(num >= daySlider.value )}"

In your case, however, your data is JSON, so your objects are not in the form that the query above will work.

Further, you are setting your dataProvider to call a function dgg but dgg is a LineChart and not a function.

In your case, I would recommend packing your data into an ArrayCollection and use filterFunction to define how to filter that data. Then, bind to the ArrayCollection directly and modify the filter function proceeded by a refresh(). You can see an example of doing this here: http://www.flex-blog.com/arraycollection-filter-example/

Good luck