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  Chart for wide data range
Posted by rohan puri on Mar-18-2009 04:05
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Hi I am looking to find a chart (we use chart director for .NET) which can plot a trend for widely distributed data points. The chart needs to reflect a trend only and not exact data points.

For e.g. i have a chart to show the number of good and bad messages posted in the last 30 days. The number of good messages for each day which will be much more than the bad ones.

e.g. Data ranges from 0 to 50000.

Do you have a chart type recommendation for reflecting this type of trend data.

  Re: Chart for wide data range
Posted by Peter Kwan on Mar-18-2009 13:59
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Hi Rohan,

You may use a trend layer in ChartDirector. See the put the good and bad messages in two layers. See the "Scatter Trend Chart" sample code.

You may put the good and bad messages in two separate charts, or in the same chart but using two separate axis, or using some other presentation methods you like. You may also use a log scale axis if you like, but you then need to remove any data value that is 0. (You cannot take the logarithm of 0.) It depends on what is the exact purpose of your chart and the nature of your data.

Hope this can help.

Regards
Peter Kwan