VBA: Modify chart data range

Question

My \"Chart data range\" is =\'sheet1\'!$A$1:$Z$10. I\'d like to make a VBA macro (or if anybody knows a formula I can use, but I couldn\'t figure one out) to in

Answer 1

Assuming that you want to expand the range (by adding one extra column) to add one more observation for each series in you diagram (and not to add a new series), you could use this code:

Sub ChangeChartRange()
    Dim i As Integer, r As Integer, n As Integer, p1 As Integer, p2 As Integer, p3 As Integer
    Dim rng As Range
    Dim ax As Range

    'Cycles through each series
    For n = 1 To ActiveChart.SeriesCollection.Count Step 1
        r = 0

        'Finds the current range of the series and the axis
        For i = 1 To Len(ActiveChart.SeriesCollection(n).Formula) Step 1
            If Mid(ActiveChart.SeriesCollection(n).Formula, i, 1) = "," Then
                r = r + 1
                If r = 1 Then p1 = i + 1
                If r = 2 Then p2 = i
                If r = 3 Then p3 = i
            End If
        Next i


        'Defines new range
        Set rng = Range(Mid(ActiveChart.SeriesCollection(n).Formula, p2 + 1, p3 - p2 - 1))
        Set rng = Range(rng, rng.Offset(0, 1))

        'Sets new range for each series
        ActiveChart.SeriesCollection(n).Values = rng

        'Updates axis
        Set ax = Range(Mid(ActiveChart.SeriesCollection(n).Formula, p1, p2 - p1))
        Set ax = Range(ax, ax.Offset(0, 1))
        ActiveChart.SeriesCollection(n).XValues = ax

    Next n
End Sub