I'm trying to create a bubble chart with a logrithmic scale on the y axis. The data I'm plotting ranges from 0.1 to 1000. When the chart is plotted, the minimum value for the y-axis is always 1 and much of the data plots below the X axis. I've tried setting the PrimaryYAxis.Range.Min = 0.1 but that doesn't do anything.The code is listed below, which first sets up the chart and then loads the data.
Private Sub SetupChart()
_BubblePlot.ImprovePerformance =
True
_BubblePlot.CalcRegions =
False
ForeColor =
Color.DarkBlue
BackColor =
Color.AliceBlue
Font =
New Font("Trebuchet MS", 8)
_BubblePlot.BackInterior =
New BrushInfo(GradientStyle.None, Color.AliceBlue, Color.AliceBlue)
_BubblePlot.ChartInterior =
New BrushInfo(GradientStyle.ForwardDiagonal, Color.LightSteelBlue, Color.AliceBlue)
_BubblePlot.ChartArea.BackInterior =
New BrushInfo(GradientStyle.None, Color.AliceBlue, Color.AliceBlue)
_BubblePlot.PrimaryXAxis.Title =
"Oerflow Duration (Hours)"
_BubblePlot.PrimaryXAxis.Format =
"F0"
_BubblePlot.PrimaryXAxis.ValueType =
ChartValueType.Double
_BubblePlot.PrimaryYAxis.Title =
"Storm Return Period (Years)"
_BubblePlot.PrimaryYAxis.Format =
"0.#"
_BubblePlot.PrimaryYAxis.ValueType =
ChartValueType.Logarithmic
_BubblePlot.PrimaryYAxis.Origin = 0.1
_BubblePlot.PrimaryXAxis.TitleFont =
New System.Drawing.Font("Verdana", 9.0F, FontStyle.Bold)
_BubblePlot.PrimaryXAxis.TitleColor =
Color.SteelBlue
_BubblePlot.PrimaryYAxis.TitleFont =
New System.Drawing.Font("Verdana", 9.0F, FontStyle.Bold)
_BubblePlot.PrimaryYAxis.TitleColor =
Color.SteelBlue
_BubblePlot.PrimaryXAxis.LabelAlignment =
StringAlignment.Center
_BubblePlot.Titles.Clear()
Dim _Title As Syncfusion.Windows.Forms.Chart.ChartTitle
'>Main Title
_Title =
New Syncfusion.Windows.Forms.Chart.ChartTitle
_Title.Text =
"Bubble Size Reflects Relative Volume of Overflow"
_Title.Font =
New System.Drawing.Font("Verdana", 12.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
_BubblePlot.Titles.Add(_Title)
_Title =
New Syncfusion.Windows.Forms.Chart.ChartTitle
_Title.Text = Globals.Project.CSOBasin
_Title.Font =
New System.Drawing.Font("Verdana", 10.0!, System.Drawing.FontStyle.Italic, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
_Title.Position =
ChartDock.Bottom
_Title.Alignment =
ChartAlignment.Far
_Title.Margin = 0
_BubblePlot.Titles.Add(_Title)
End Sub
Private Sub LoadChartData()
Dim RarestDuration(Globals.Project.NoCSOs - 1) As Single, RarestStormTr(Globals.Project.NoCSOs - 1) As Single
Dim CSODate(Globals.Project.NoCSOs - 1) As Date, CSODuration(Globals.Project.NoCSOs - 1) As Single, CSOVolume(Globals.Project.NoCSOs - 1) As Single
_BubblePlot.Series.Clear()
Globals.Project.RarestCSOResultsGet(RarestDuration, RarestStormTr)
Globals.Project.CSODataGet(CSODate, CSODuration, CSOVolume)
_series =
New ChartSeries("Bubble", ChartSeriesType.Bubble)
_series.Style.Symbol.Color =
Color.Blue
_BubblePlot.PrimaryYAxis.Range.Min = 0.1
For I As Integer = Globals.Project.NoCSOs - 1 To 0 Step -1
_series.Points.Add(CSODuration(I), RarestStormTr(I), CSOVolume(I))
Next
_BubblePlot.Series.Add(_series)
_BubblePlot.Refresh()
------
End Sub
