向散点图添加额外的级数

Question

我正在尝试创建一个代码，将序列添加到散点图中。代码运行，但添加了大约100个未指定的额外数据系列。我的vba技能很基本。

Dim DownSweep As Chart
Dim xrng As Range
Dim yrng As Range
Dim title As Range
Dim dsvt As Worksheet
Dim dst As Worksheet
Dim i As Integer
t = 1
CLEAN:
If t < ActiveWorkbook.Charts.Count + 1 Then
If ActiveWorkbook.Charts(t).Name = "DownSweep Graph" Then
Application.DisplayAlerts = False
ActiveWorkbook.Charts("DownSweep Graph").Delete
Application.DisplayAlerts = True
t = t + 1
GoTo CLEAN
End If
End If
Set dst = Worksheets("Template 2 - Down Sweep")
Set dsvt = Worksheets("DownSweep ViscosityTemperature")
Set xrng = dsvt.Range(dsvt.Range("C2"), dsvt.Range("C2").End(xlDown))
Set yrng = dsvt.Range(dsvt.Range("F2"), dsvt.Range("F2").End(xlDown))
Set title = dsvt.Range("F1")
dsvt.Range("E1").Select
Set DownSweep = Charts.Add
DownSweep.Name = "DownSweep Graph"
With DownSweep
.ChartType = xlXYScatter
.SeriesCollection.NewSeries
.SeriesCollection(1).XValues = xrng
.SeriesCollection(1).Values = yrng
.SeriesCollection(1).Name = title
End With
title = title.Offset(0, 1)
For i = 2 To 99
With DownSweep.SeriesCollection.NewSeries()
.XValues = xrng.Offset(0, i - 1).Value
.Values = yrng.Value
.Name = title
End With
title = title.Offset(0, i)
Next i
End Sub

如何防止这种情况发生？

如有任何帮助，我们将不胜感激。

Answer 1

这是因为在添加图表之前，您要在源数据中选择一个单元格。因此，它会自动将该数据设置为其源，并创建序列集合。

因此，请确保活动单元格不位于源数据中，或者在添加新系列集合之前，使用以下代码删除现有系列集合。

With DownSweep
Do While .SeriesCollection.Count > 0
.SeriesCollection(1).Delete
Loop
End With