X-axis chart

I am having trouble clearing a chart that read in a waveform from a analog daqmxbase read vi. I wired an empty array to the history node of the chart. It clears the the waveform on the chart, but it does not reset x-axis values to zero. It keeps starting from the last run. As of right now, the x-axis starts at 3196366917 if i start another run. I tried wiring the history node as a 2-D empty array, but the history node will only accept a 1-D empty array. Could someone please help me out? Thanks

Your formula express vi generates dynamic data that contains the current timestamp, which is then used by the chart for the time axis. You need to convert it back to a single scalar to loose that extra information.
(see attached modification, LabVIEW 7.0)
LabVIEW Champion . Do more with less code and in less time .
Attachments:
analogresetMOD.vi ‏228 KB

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Please re-post if this is still an issue or purchase a case and have a dedicated support engineer work with you directly:
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2 Vertical Axis Chart & State Change Bug - Clarified

When a column or line chart has 2 vertical axis (one on the left and one on the right), the additional vertical axis must be defined at the series level as the definition at the chart level only allows for one vertical axis.
When you define the additional vertical axis at the series level, it will populate on the chart when the chart is first rendered. But, it fails to populate after a state change. This is apparently due to the fact that the “maximum” property on the additional vertical axis defined at the series level changes to 100 causing the line not to render as the data values are greater than 100.
This is a Flex 4 problem. Flex 3 does not have this problem.
Below is an example application that demonstrates the problem.
The example first presents a chart with Gross Sales plotted as columns using the left axis and Net Sales plotted as a line using the right axis. Note, the vertical axis for Net Sales is defined at the series level.
When you click the “Data” button a state change occurs and a data grid is presented showing Gross Sales and Net Sales. When you click the “Chart” button another state change occurs and the chart is presented again. Gross Sales will still populate, but Net Sales fails to populate. This is the problem.
<?xml version="1.0" encoding="utf-8"?>
<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]
 public var dp:ArrayCollection = new ArrayCollection([
 {DTSALE:"11-Nov-07", NET:141.87, GROSS:63.34},
 {DTSALE:"12-Nov-07", NET:145.74, GROSS:58.56},
 {DTSALE:"13-Nov-07", NET:142.77, GROSS:62.34},
 {DTSALE:"14-Nov-07", NET:148.06, GROSS:75.65},
 ]]>
</fx:Script>
<s:states>
 <s:State name="chart"/>
 <s:State name="data"/>
</s:states>
<s:controlBarContent>
 <s:Button label="Chart" click="this.currentState='chart'"/>
 <s:Button label="Data" click="this.currentState='data'"/>
</s:controlBarContent>
<s:Group width="100%" height="100%">
 <mx:ColumnChart includeIn="chart"
 width="100%" height="100%" dataProvider="{dp}">
 <mx:horizontalAxis>
 <mx:CategoryAxis categoryField="DTSALE"/>
 </mx:horizontalAxis>
 <mx:verticalAxis>
 <mx:LinearAxis id="vLeft" title="Gross Sales Columns"/>
 </mx:verticalAxis>
 <mx:series>
 <mx:ColumnSeries yField="GROSS" verticalAxis="{vLeft}"/>
 <mx:LineSeries yField="NET">
 <mx:verticalAxis>
 
 <mx:LinearAxis id="vRight" title="Net Sales Line"/>
 </mx:verticalAxis>
 </mx:LineSeries>
 </mx:series>
 <mx:verticalAxisRenderers>
 <mx:AxisRenderer axis="{vLeft}" placement="left"/>
 <mx:AxisRenderer axis="{vRight}" placement="right"/>
 </mx:verticalAxisRenderers>
 </mx:ColumnChart>
 <mx:DataGrid dataProvider="{dp}" width="100%" height="100%" includeIn="data">
 <mx:columns>
 <mx:DataGridColumn dataField="DTSALE"/>
 <mx:DataGridColumn dataField="NET"/>
 <mx:DataGridColumn dataField="GROSS"/>
 </mx:columns>
 </mx:DataGrid>
</s:Group>
</s:Application>

I found a workaround.
When the chart goes through a state change, the “maximum” property on the additional vertical axis defined at the series level defaults to 100 causing the line not to render as the data values are greater than 100. Setting this to a higher value (maximum="10000" ) forces the line to appear consistently after a state change.
I still believe this is a bug.
The downside is that I will have to dynamically determine the maximum value to use at runtime, but at least I can still use state changes on two vertical axis charts.

2 Vertical Axis Chart & State Change Bug

When a column or line chart has 2 vertical axis (one on the left and one on the right), the additional vertical axis must be defined at the series level as the definition at the chart level only allows for one vertical axis.
When you define the additional vertical axis at the series level, it will populate on the chart when the chart is first rendered. But, it fails to populate after a state change.
This problem does not occur if the data provider uses static data defined in Action Script as an array collection. But, the problem always occurs if the data provider uses a web service.
This is a Flex 4 problem. Flex 3 does not have this problem.
Below is an example that will demonstrate the problem. It uses the Flex Grocer web service that comes on the CD with Jeff Tapper’s book “Adobe FLEX 3 Training from the Source” (an Adobe Press book). However, this example can be easily modified to use any web service.
The example is currently pointing to static data defined in Action Script.
You can switch from static data to web service data by commenting the instruction on line 32 ( dp = dpStatic; ) and un-commenting the instruction on line 33 ( dp = (event.result as ArrayCollection); ).
The example first presents a chart with Gross Sales plotted as columns using the left axis and Net Sales plotted as a line using the right axis. Note, the vertical axis for Net Sales is defined at the series level.
When you click the “Data” button a state change occurs and a data grid is presented showing Gross Sales and Net Sales. When you click the “Chart” button another state change occurs and the chart is presented again. If you are pointing to static data, both Gross Sales and Net Sales will populate on the chart. If you are pointing to web service data, Gross Sales will still populate, but Net Sales fails to populate. This is the problem.
Does anyone have a solution or work around for this problem?
<?xml version="1.0" encoding="utf-8"?>
<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"
 creationComplete="init()">
<fx:Script>
 <![CDATA[
 import mx.rpc.events.ResultEvent;
 import mx.rpc.events.FaultEvent;
 import mx.collections.ArrayCollection;
 [Bindable]
 public var selectedType:String = "All";
 [Bindable]
 public var startDate:Date = new Date(2006, 4, 1);
 [Bindable]
 public var endDate:Date = new Date(2006, 4, 5);
 [Bindable]
 public var dp:ArrayCollection;
 public var dpStatic:ArrayCollection = new ArrayCollection([
 {DTSALE:"11-Nov-07", NET:41.87, GROSS:63.34},
 {DTSALE:"12-Nov-07", NET:45.74, GROSS:58.56},
 {DTSALE:"13-Nov-07", NET:42.77, GROSS:62.34},
 {DTSALE:"14-Nov-07", NET:48.06, GROSS:75.65},
 private function init():void {
 getData();
 private function getData():void {
 dashboardWS.getSalesData.send();
 private function salesRPCResult(event:ResultEvent):void {
 dp = dpStatic; // Line on chart always populates with static data
 // dp = (event.result as ArrayCollection); // Line on chart does not populate with WebService data after state change
 private function showFault(event:FaultEvent):void {
 trace(event.fault.faultCode + ":" + event.fault.faultString);
 ]]>
</fx:Script>
<fx:Declarations>
 <mx:WebService id="dashboardWS" fault="showFault(event)"
 wsdl="http://localhost:8300/flexGrocer/cfcs/aggregate.cfc?wsdl">
 <mx:operation name="getSalesData" result="salesRPCResult(event)">
 <mx:request>
 <startDate>{startDate}</startDate>
 <endDate>{endDate}</endDate>
 <category>{selectedType}</category>
 </mx:request>
 </mx:operation>
 </mx:WebService>
</fx:Declarations>
<s:states>
 <s:State name="chart"/>
 <s:State name="data"/>
</s:states>
<s:controlBarContent>
 <s:Button label="Chart" click="this.currentState='chart'"/>
 <s:Button label="Data" click="this.currentState='data'"/>
</s:controlBarContent>
<s:HGroup width="100%" height="100%">
 <mx:ColumnChart includeIn="chart"
 width="100%" height="100%" dataProvider="{dp}">
 <mx:horizontalAxis>
 <mx:CategoryAxis categoryField="DTSALE"/>
 </mx:horizontalAxis>
 <mx:verticalAxis>
 <mx:LinearAxis id="vLeft" title="Gross Sales Columns"/>
 </mx:verticalAxis>
 <mx:series>
 <mx:ColumnSeries yField="GROSS" verticalAxis="{vLeft}"/>
 <mx:LineSeries yField="NET">
 <mx:verticalAxis>
 <mx:LinearAxis id="vRight" title="Net Sales Line"/>
 </mx:verticalAxis>
 </mx:LineSeries>
 </mx:series>
 <mx:verticalAxisRenderers>
 <mx:AxisRenderer axis="{vLeft}" placement="left"/>
 <mx:AxisRenderer axis="{vRight}" placement="right"/>
 </mx:verticalAxisRenderers>
 </mx:ColumnChart>
 <mx:DataGrid dataProvider="{dp}" width="100%" height="100%" includeIn="data">
 <mx:columns>
 <mx:DataGridColumn dataField="DTSALE"/>
 <mx:DataGridColumn dataField="NET"/>
 <mx:DataGridColumn dataField="GROSS"/>
 </mx:columns>
 </mx:DataGrid>
</s:HGroup>
</s:Application>

I found a workaround.
When the chart goes through a state change, the “maximum” property on the additional vertical axis defined at the series level defaults to 100 causing the line not to render as the data values are greater than 100. Setting this to a higher value (maximum="10000" ) forces the line to appear consistently after a state change.
I still believe this is a bug.
The downside is that I will have to dynamically determine the maximum vale to use at runtime, but at least I can still use state changes on two vertical axis charts.

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Hi,
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It should not cause problems on applications if you have not used any unsupported features.
But always upgrade might cause problems and you can not be 100% sure it goes smoothly.
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Check Known Issues
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http://download.oracle.com/docs/cd/E23903_01/doc/doc.41/e21672/toc.htm
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Attachments:
Temperature Recorder.vi ‏100 KB

First I am very thankful to you for your kind cooperation. As I am beginner
my questions may be the unintelligent.
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Attachments:
data.JPG ‏79 KB

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