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    <p>Okay, Here I found a solutions for the problem. Similar to what @fotomut mentioned above. I have copied all the code from 'CategoryAxis' except rewrote the 'udpate()' method. This is where the labels get generated. Here is my implementation of update method, may not be a perfect solution....</p> <p>But, I am facing an issue here. For some reason, the graph and labels looks a bit shifted towards the right hand side. I am unable to post a picture comparing my CustomDateAxis to flex provided CategoryAxis to better explain this, as I am restricted not to upload any files. I am trying to fix this, yet to find a solution...</p> <pre><code>if (!_labelSet) { //I do not need label for each item in my dataprovider. //Hence creating a 'categoryValues' array with limited labels. var chartDP:ArrayCollection = this.dataProvider as ArrayCollection; var axisLabels:Array /* of AxisLabel */ = []; var labelsArr:Array = []; var categoryItems:Array = []; var dataMap:Object = {}; _catMap = {}; _categoryValues = []; _labelsMatchToCategoryValuesByIndex = []; if(chartDP.length != 0) { for(var indx:int=0; indx&lt;chartDP.length; indx++){ // Add each item to the map. //This is mandatory as it's being used internally to draw the Y-value _catMap[chartDP.getItemAt(indx).timeStamp.toString()] = indx; } var firstItem:Object = chartDP.getItemAt(0); var lastItem:Object = chartDP.getItemAt(chartDP.length - 1); var incrCounter:int; var timeDiffInMillis:Number = (lastItem.timeStamp) - (firstItem.timeStamp); var arrIndx:int=0; if(timeDiffInMillis &lt;= MILLISECONDS_IN_HOUR){ LIMIT_LABEL_CNT = 12; INT_LBL_UNITS = "MINUTES"; }else if(timeDiffInMillis &gt; MILLISECONDS_IN_HOUR &amp;&amp; timeDiffInMillis &lt;= MILLISECONDS_IN_DAY){ LIMIT_LABEL_CNT = 12; INT_LBL_UNITS = "HOURS"; }else if(timeDiffInMillis &gt; MILLISECONDS_IN_DAY &amp;&amp; timeDiffInMillis &lt;= MILLISECONDS_IN_WEEK){ LIMIT_LABEL_CNT = 7; INT_LBL_UNITS = "DAYS"; }else if(timeDiffInMillis &gt; MILLISECONDS_IN_WEEK &amp;&amp; timeDiffInMillis &lt;= MILLISECONDS_IN_MONTH){ LIMIT_LABEL_CNT = 4; INT_LBL_UNITS = "WEEKS"; }else if(timeDiffInMillis &gt; MILLISECONDS_IN_MONTH &amp;&amp; timeDiffInMillis &lt;= MILLISECONDS_IN_YEAR) { LIMIT_LABEL_CNT = 12; INT_LBL_UNITS = "MONTHS" } if(chartDP.length &lt;= LIMIT_LABEL_CNT) incrCounter = 1; else incrCounter = chartDP.length/LIMIT_LABEL_CNT; var i:int=0; for(i=0,arrIndx=0; i&lt;chartDP.length; i=i+incrCounter){ arrIndx = i; _categoryValues[arrIndx] = chartDP.getItemAt(i).timeStamp; dataMap[arrIndx] = chartDP.getItemAt(i); //There is a very good chance for the incrCounter to omit //the last items in the DataProvider. if((chartDP.length-i) &lt;= incrCounter){ arrIndx=arrIndx+incrCounter; _categoryValues[arrIndx] = chartDP.getItemAt(chartDP.length-1).timeStamp; dataMap[arrIndx] = chartDP.getItemAt(chartDP.length-1); } } var min:Number = -_padding; var max:Number = _categoryValues.length - 1 + _padding; var alen:Number = max - min; var label:AxisLabel; var n:int = _categoryValues.length; if (_labelFunction != null) { var previousValue:Object = null; for (i=0; i&lt;n; i++) { if (_categoryValues[i] == null) continue; if(previousValue != null &amp;&amp; _categoryValues[i] != null){ if(previousValue == _categoryValues[i]) continue; } label = new AxisLabel((i - min) / alen, _categoryValues[i], timeLblFormatFunction(_categoryValues[i], previousValue, this, dataMap[i])); _labelsMatchToCategoryValuesByIndex[i] = label; axisLabels.push(label); previousValue = _categoryValues[i]; } } else { for (i = 0; i &lt; n; i++) { if (!_categoryValues[i]) continue; label = new AxisLabel((i - min) / alen, _categoryValues[i], _categoryValues[i].toString()); _labelsMatchToCategoryValuesByIndex[i] = label; axisLabels.push(label); } } } _labelSet = new AxisLabelSet(); _labelSet.labels = axisLabels; _labelSet.accurate = true; _labelSet.minorTicks = minorTicks; _labelSet.ticks = generateTicks(); } </code></pre>
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    1. POCreate Dynamic DateTimeAxis in Flex
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    1. COOkay, found the answer to the issue where the labels are being shifted to the right. The '_padding' property was doing the trick. I found from the class documentation that the 'padding' value gets reset to '0' for linecharts/areachart and 0.5 to columnchart/barchart. But this was not happening to me in case of linechart for some reason, hence I am forcing it to '0' to do it. Now, my chart works as expected with generic X-axis. Thanks....
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