Microsoft KB Archive/139662

= How to Use a Visual Basic Macro to Create a Bubble Chart =

Article ID: 139662

Article Last Modified on 10/11/2006

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APPLIES TO


 * Microsoft Excel 95 Standard Edition
 * Microsoft Excel 5.0 Standard Edition
 * Microsoft Excel 5.0 Standard Edition
 * Microsoft Excel 5.0 for Macintosh

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This article was previously published under Q139662



SUMMARY
In Microsoft Excel, you can write a macro to create a bubble chart. Bubble charts are similar to xy (scatter) charts; however, instead of having uniform markers where the pair of x and y values intersect, these points are marked with circles that indicate the relative magnitude of the values in a third series.



MORE INFORMATION
Microsoft provides programming examples for illustration only, without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose. This article assumes that you are familiar with the programming language that is being demonstrated and with the tools that are used to create and to debug procedures. Microsoft support engineers can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific requirements. Enter the following code on a module sheet and follow the instructions below: Sub BubbleChart 'define variables for workbook, chart, and chart series MyBook = ActiveWorkbook.Name MyChart = ActiveChart.Name MySeries = ActiveChart.SeriesCollection(1).Formula

'define variables for worksheet and chart series reference StartVal = InStr(InStr(1, MySeries, "(") + 1, MySeries, ",") + 1     EndSheetVal = InStr(StartVal, MySeries, "!")      mysheet = Mid(MySeries, StartVal, EndSheetVal - StartVal)      EndVal = InStr(StartVal, MySeries, ",")      mysource = Mid(MySeries, StartVal, EndVal - StartVal)

If InStr(mysheet,"'") Then                    'strip out apostrophe mysheet = Mid(mysheet, 2, Len(mysheet) - 2) 'if sheet name has a     End If                                         'space

'begin loop to add data labels to chart Counter = 1 For Each xItem In Range(mysource) xLabel = xItem.Offset(0, -1).Value ActiveChart.SeriesCollection(1).Points(Counter).HasDataLabel _ =True ActiveChart.SeriesCollection(1).Points(Counter).DataLabel.Text _ =xLabel Counter = Counter + 1 Next xItem

'create oval on worksheet (used for chart bubbles) Workbooks(MyBook).Sheets(mysheet).Activate ActiveSheet.Ovals.Add(335.25, 12.75, 52.5, 52.5).Select Application.ScreenUpdating = False MyOval = ActiveSheet.DrawingObjects.Name

'get values from worksheet to compute bubble sizes Set MyBubbleRange = Range(mysource).Offset(0, 3)

'begin loop to compute bubble size and add to chart data point For Counter = 1 To MyBubbleRange.Count BubbleValue = MyBubbleRange(Counter) * 50 ActiveSheet.DrawingObjects(MyOval).Select With Selection .Width = BubbleValue .Height = BubbleValue End With Selection.Copy Workbooks(MyBook).Sheets(MyChart).Activate ActiveChart.SeriesCollection(1).Points(Counter).Select Selection.Paste

'select worksheet MyBubbleRange.Parent.Activate Next Counter

'activate chartsheet ActiveWorkbook.Sheets(MyChart).Activate

'remove oval from worksheet ActiveWorkbook.Sheets(mysheet).DrawingObjects(MyOval).Delete End Sub

To use the macro
  In a new worksheet in Microsoft Excel, enter the following values:      A1:        B1: Gross Revenues  C1: Net Income  D1: # of Plants A2: East  B2: 831191          C2: 35427       D2: 26 A3: West  B3: 622199          C3: 54263       D3: 13 A4: North B4: 153794          C4: 80881       D4: 40 A5: South B5: 711327          C5: 33872       D5: 35  Select the range B1:C5. From the Insert menu, choose Chart, As New Sheet. In the chart wizard choose the following:

 Step 2: choose XY (Scatter) Step 3: choose Type 1 Step 4: choose Data Series in Columns; Use first 1 column(s) for X data; Use first 1 row(s) for legend text. Step 5: choose No for Add a legend; enter titles is optional.</li></ol> </li> Activate the worksheet and type the following formula in cell E2:

=D2/MAX($D$2:$D$5)

</li> Select cells E2:E5 and click Fill Down on the Edit menu. This formula calculates the number of plants for each region relative to the total number of plants in all four regions.</li> Select the chart sheet and run the macro. Click Macro on the Tools menu, click BubbleChart, and click Run.</li></ol>

For additional information on creating Bubble Charts using the Microsoft Excel 4.0 Macro language, please see the following article(s) in the Microsoft Knowledge Base:

107729 Excel: Macro to Create Bubble Chart

Additional query words: bubbles circles XL

Keywords: kbhowto kbprogramming kbcode KB139662

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