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 SPC Control Chart Tools for .Net
 Frequency Histogram X-Axis Scale		  New Topic  Reply to Topic
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chrism

USA
3 Posts
Posted - 24 Apr 2013 :  16:32:04  Show Profile  Reply with Quote


Hi,
I am setting the X-Axis start and end values like so:

Me.XGrid.ChartObjScale.SetScaleX(-10, 10)

However, the histogram is showing as below with a scale of -15 to 15.

Does the chart expand the X-Axis on its own to display the full normal curve?
Or could there be another reason the chart's X-Axis is not being set to be from -10 to 10?

Thanks.

quinncurtis

1586 Posts
Posted - 25 Apr 2013 :  08:46:43  Show Profile  Reply with Quote
The method BuildChart auto-scales the coordinate system to include all of the data added to the chart, regardless of any previous settings. You can however, change the coordinate system scale after your call BuildChart. You must also call a group of auto-axis routines after you do that to make sure the x- and y-axes adjust to the new scale. Last you call UpdateDraw to force a redraw of the chart.


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Me.BuildChart()  
      
Me.CoordinateSystem.SetScaleX(-10, 10)
Me.XAxis.CalcAutoAxis()
Me.YAxis.CalcAutoAxis()
Me.XAxisLab.CalcAutoAxisLabels()
Me.YAxisLab.CalcAutoAxisLabels()
Me.UpdateDraw()
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