Excel VBA - Get chart data range - excel

Question

I want to add data to a bunch of existing charts. Assume that each chart has a different number of data series and that the location of the raw data is somewhere in the same workbook. Here's what I'm starting with:
For iChart = 1 To iCount
ActiveSheet.ChartObjects("Chart " & iChart).Activate
intSeries = 1
Do Until ActiveChart.SeriesCollection(intSeries).Name = ""
Set rXVal = ActiveChart.SeriesCollection(intSeries).XValues '<- Object Required error
Set rXVal = Range(rXVal, rXVal.End(xlDown))
Set rYVal = ActiveChart.SeriesCollection(intSeries).Values
Set rYVal = Range(rYVal, rYVal.End(xlDown))
ActiveChart.SeriesCollection(intSeries).XValues = rXVal
ActiveChart.SeriesCollection(intSeries).Values = rYVal
intSeries = intSeries + 1
Loop
Next iChart
I know that ActiveChart...XValues = rXVal works, but I'm getting an "Object Required" error on the Set rXVal = ActiveChart....XValues line. I'm assuming that since a range went in to define the data series, I can get that range back out again and then add to it.
UPDATE
To clarify things a little, I have accelerometers in 8 places and FFT software setup to record peak vibration response in 4 separate frequency bands. This yields 32 data points per sample. When exporting, the software spits out an Excel workbook with 4 sheets; one for each frequency band. Each sheet has the accelerometer names going across and sample numbers going down.

Answer 1

I have succeeded using this syntax:
Dim rXVal() As Variant
rXVal = ActiveChart.SeriesCollection(intSeries).XValues
UPDATE
In this case you get an array, because your given statement (ActiveChart.SeriesCollection(intSeries).XValues) is an array and not a range. This is what you see in Locals window if you dig into Series object of ActiveChart.SeriesCollection(intSeries):
(in my dummy data I have rows named r1, r2, r3, r4.)
What I want to say, XValues does not have any property which would indicate its occupied range.
If you actually need a range, I would suggest getting it from the formula property. And the way I would suggest is replacing your error causing line with this one:
Set rXVal = Range(Split(ActiveChart.SeriesCollection(intSeries).Formula, ",")(1))
Next, I see you trying to get the range for Values. Similarly, use this:
Set rYVal = Range(Split(ActiveChart.SeriesCollection(intSeries).Formula, ",")(2))
Another thing.
The following lines will cause you an error finally:
intSeries = 1
Do Until ActiveChart.SeriesCollection(intSeries).Name = ""
...some code...
intSeries = intSeries + 1
Loop
Do change them with:
For intSeries = 1 To ActiveChart.SeriesCollection.Count
...some code...
Next
Yet another thing.
Consider using With and End With, as you repeat a lot ActiveChart.SeriesCollection(intSeries). Then your code will be much more readable, as you would just skip this long line! Wouldn't that be awesome???

Answer 2

This works fine for me:
Dim rXVal() As Variant
Dim rXValMin, rXValMax As Double
rXVal = ActiveChart.SeriesCollection(intSeries).XValues
rXValMin = WorksheetFunction.Min(rXVal)
rXValMax = WorksheetFunction.Max(rXVal)