Geoff, Not literally Zero data, but blank data.
I modified the following simple example from StackOverflow to show what you can do... see the link, and then the modified code below. http://stackoverflow.com/questions/3233357/flex-extending-x-axis-on-linechart-for-unknown-future-data <?xml version="1.0"?> <!-- charts/BasicLine.mxml --> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml";> <mx:Script><![CDATA[ import mx.collections.ArrayCollection; [Bindable] public var expenses:ArrayCollection = new ArrayCollection([ {Month:"Jan", Profit:3000}, {Month:"Feb", Profit:""}, {Month:"Mar", Profit:""}, {Month:"Apr", Profit:""}, {Month:"May", Profit:3000}, {Month:"Jun", Profit:2000}, {Month:"Jul", Profit:3000}, {Month:"Aug", Profit:4000} ]); ]]></mx:Script> <mx:Panel title="Line Chart"> <mx:LineChart id="myChart" dataProvider="{expenses}" showDataTips="true" > <mx:horizontalAxis> <mx:CategoryAxis dataProvider="{expenses}" categoryField="Month" /> </mx:horizontalAxis> <mx:series> <mx:LineSeries yField="Profit" displayName="Profit" interpolateValues="false" /> </mx:series> </mx:LineChart> <mx:Legend dataProvider="{myChart}"/> </mx:Panel> </mx:Application> On Sat, Feb 18, 2012 at 12:06 AM, gtb104 <gtb...@yahoo.com> wrote: > ** > > > Brendan, > > I think that I understand what you're talking about. Just two questions. > What's "0" data? Is that just data with a value of zero? Also, how do I get > the line chart to ignore zero data? > > Thanks, > Geoff > > > --- In flexcoders@yahoogroups.com, Brendan Meutzner <bmeutzner@...> wrote: > > > > Geoff, > > > > You can create a large dataset with empty, or 0 values, for your Y Axis. > > Then when you populate data from your service, add/append those values to > > the end of your dataset, while removing an equal number of empty values > > from the beginning of the dataset. If you've created an ArrayCollection > of > > these values, then via binding, it will update the chart automatically as > > you add/remove values to/from this collection. Have your line chart > ignore > > 0 values and the line won't draw at the beginning, and only begin drawing > > on the right where you've started populating data. > > > > Continue this process as you receive data, and eventually you will have a > > full dataset, and as you continue to add/remove values, your full chart > > line will continue updating appearing to move from right to left. > > > > Does all this make sense? I've used a Mac for years now, so I'm pulling > > from memory what the task manager charts look like, but I think this is > > accurate. > > > > Let me know if you need any clarification on the method I'm suggesting > > above. > > > > > > Brendan > > > > > > On Wed, Feb 15, 2012 at 12:06 PM, gtb104 <gtb104@...> wrote: > > > > > ** > > > > > > > > > > Rishi, > > > > > > Sorry, but I don't see how that example fulfills my request. What I'm > > > trying to show is basically volume over time. The x axis is time, the y > > > axis is volume. The chart will be feed from BlazeDS messages that will > be > > > coming in around once per second. I'd like to plot the volume data > points > > > from right to left, like how the Task Manager plots CPU performance. > I'm > > > hoping this clarifies my need. > > > > > > Thanks, > > > Geoff > > > > > > --- In flexcoders@yahoogroups.com, "Tandon, Rishi" <rishitandon123@> > > > wrote: > > > > > > > > Geoff, you can  check the Stock chart from amcharts > > > > http://flex.amcharts.com/examples/stock_chart_example > > > > > > > > > > > > > Regards, > > > > Rishi Tandon > > > > > > > > > > > > ________________________________ > > > > From: gtb104 <gtb104@> > > > > > > > To: flexcoders@yahoogroups.com > > > > Sent: Wednesday, February 15, 2012 8:30 PM > > > > Subject: [flexcoders] Line Chart like Task Manager > > > > > > > > > > > >  > > > > > I'm looking to make a line chart that looks similar to Windows Task > > > Manager (data comes in from right to left for a fixed period of time). > > > Looking at the API, it doesn't appear that the LineChart natively > supports > > > that, and I couldn't find any 3rd party libraries that already do that. > > > Does anyone have any ideas? > > > > > > > > Thanks, > > > > Geoff > > > > > > > > > > > > > > > > > >
