Lesson 24: Creating Charts and Graphs

In Excel VBA , we can write code to create charts and graphs easily based on the data on the spreadsheet. Excel VBA has made charting engine as part of the Shape object. It is also an object by itself. We can create charts on a sheet of their own or embed them into an existing worksheet. The chart sheet is the Chart object whereas the embedded chart is part of the shape collection for the worksheet.

24.1 Creating a Pie Chart

To create a pie chart in a spreadsheet, first of all you need to enter a range of data in spreadsheet. After entering the data, you need to name the range by right-clicking the range and clicking define name in the pop-up menu. Name the chart MyChart Now insert a command button and then click it to enter the following code in the Excel VBA editor

  Private Sub CommandButton1_Click()

    ActiveSheet.Shapes.AddChart.Select

    ActiveSheet.Shapes(1).Top = 10

    ActiveSheet.Shapes(1).Left = 10

    ActiveChart.ChartType = xl3DPie

    ActiveChart.PlotArea.Select

    ActiveChart.SetSourceData Source:=Range("MyChart")

    ActiveChart.HasTitle = True

    ActiveChart.ChartTitle.Text = "My Chart"

  End Sub

The Output

Figure 24.1: Pie Chart

To separate the pie chart into slices (The technical term is explode), you can add this line to the code:

  ActiveChart.SeriesCollection(1).Explosion = 10

As there are five sectors, setting the explosion value to 10 explode all slices. You will get the following chart:

Figure 24.2

24.2 Creating a Bar Graph

To draw a bar graph, you just need to change the ChartType to xl3DColumn.

  Private Sub CommandButton2_Click()

    ActiveSheet.Shapes.AddChart.Select

    ActiveSheet.Shapes(1).Top = 10

    ActiveSheet.Shapes(1).Left = 10

    ActiveChart.ChartType = xl3DColumn

    ActiveChart.PlotArea.Select

    ActiveChart.SetSourceData Source:=Range("MyChart")

    ActiveChart.HasTitle = True

    ActiveChart.ChartTitle.Text = "My Chart"

  End Sub

Figure 24.3

Excel VBA has built-in parameters to define the types of charts that can be drawn on a spreadsheet. You can refer to the parameters as the ChartType properties. The list of common properties for ChartType are listed below:

For example, if you change the ChartType property to xlLine using the code

  ActiveChart.ChartType = xlLine

you can get a line graph as follow: