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Labeling X-Y Scatter Plots

Please Note: This article is written for users of the following Microsoft Excel versions: 97, 2000, 2002, and 2003. If you are using a later version (Excel 2007 or later), this tip may not work for you. For a version of this tip written specifically for later versions of Excel, click here: Labeling X-Y Scatter Plots.

Martin has a worksheet containing 50 rows of data, each row describing a single object. Column A contains the name of the object, column B contains its X coordinate, and column C contains its Y coordinate. When he creates an X-Y scatter chart (column B against column C) the result, as desired, is a graph showing an array of points showing the location of the objects. However, Martin can't seem to label the data points with their individual names (from column A). When he tries to label the data points the only available options are to label each point with its X value, Y value, or Series Name. Martin wonders if there is a way he can easily use Column A to label the plotted data points.

This can be done manually, but it is tedious at best. For 50 rows it would quickly be brutal, so it is best to look at a macro-oriented approach. One idea is to use a macro similar to the following, which steps through the data points in the X-Y chart and reads the label values from column A.

Sub DataLabelsFromRange()
    Dim Cht As Chart
    Dim i, ptcnt As Integer

    Set Cht = ActiveSheet.ChartObjects(1).Chart
    On Error Resume Next
    Cht.SeriesCollection(1).ApplyDataLabels _
      Type:=xlDataLabelsShowValue, _
      AutoText:=True, _
      LegendKey:=False

    ptcnt = Cht.SeriesCollection(1).Points.Count
    For i = 1 To ptcnt
        Cht.SeriesCollection(1).Points(i).DataLabel.Text = _
          ActiveSheet.Cells(i + 1, 1).Value
    Next i
End Sub

The macro assumes that the first row of the worksheet contains header information and that the actual data begins in row 2. If the data really begins in row 1, then change "i + 1" to simply "i". (This macro approach is actually a variation of a macro found on pages 570-571 of John Walkenbach's excellent book Excel 2003 Power Programming with VBA.)

One rather unique non-macro approach is to use Excel's custom formats. All you need to do is set up a bunch of custom formats that contain only the text you want to be displayed. For example, if you have the values Age, 15, and 23 in cells A3 to C3, you can format either cell B3 or C3 to show the word "Age" even though the value will remain 15 or 23, respectively. Just enter "Age" (including the quotation marks) for the Custom format for the cell. Then format the chart to display the label for X or Y value.

When you do this, the X-axis values of the chart will probably all changed to whatever the format name is (i.e., Age). However, after formatting the X-axis to Number (with no digits after the decimal in this case) rather than General, the chart should display correctly.

This approach can obviously still take a bit of time to implement as you set up and apply a bunch of custom formats for each value in your data series. If you don't want to mess with writing and testing your own macros or creating a bunch of custom formats, you can always turn to add-ins written by others. Microsoft MVP Rob Bovey has created an excellent (free) add-in for Excel which includes an X-Y labeling feature among several others. It can be downloaded at this address:

http://www.appspro.com/Utilities/ChartLabeler.htm

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (3503) applies to Microsoft Excel 97, 2000, 2002, and 2003. You can find a version of this tip for the ribbon interface of Excel (Excel 2007 and later) here: Labeling X-Y Scatter Plots.

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Comments for this tip:

Walter_Fr74    29 Oct 2016, 12:01
Thanks for this as it works with a minor modification as described below. For some reason the first Point in the list was labelled 11 & all the others 0 (zero). I am using Excel 2000 Pro on a PC.

I modified the following phrase in the "For......Next" block:

_ActiveSheet.Cells(i + 1, 1).Value

The line was changed from:

 Cht.SeriesCollection(1).Points(i).DataLabel.Text = _
          ActiveSheet.Cells(i + 1, 1).Value

To:
 Cht.SeriesCollection(1).Points(i).DataLabel.Text = i

This can easily be modified to whatever you want eg: "Point " & i . However, is it possible to list them as:

1_X value, Y value
2_X value, Y value
3_X value, Y value

etc?

In response to DSC's comment. The macro needs to be in the Vba Sheet associated with the Graph Excel worksheet.
Jessie    07 Apr 2013, 00:03
Okay, now it's not working; after a test run of 3 rows, I went in to apply it to my entire set of data and now have error code 1004, application-defined or object-defined error...
Jessie    06 Apr 2013, 23:06
Thank you so much for this advice!! I was nearly in tears trying to plot 56 rows of data, but once I entered the macro, it worked like a charm!
DSC    05 Apr 2013, 14:56
I'm getting the Runtime error "1004: Application-defined or object-defined error.

When I debug it shows this piece of code as the culprit.

Set Cht = ActiveSheet.ChartObjects(1).Chart

Not sure what to do.
a.r.b.    09 Mar 2013, 16:41
I get:

Runtime error "1004":
Unable to get the ChartObjects property of the Chart class

for line

Set Cht = ActiveSheet.ChartObjects(1).Chart

I googled a bit around, but the couple of hits I found where for specific more complex issues.

I am posting here first instead of getting generic VB help on the forums because I am running Excel 2002, so if there might be a compatibility issue you would be the first to know :-)

Thanks !
 
 

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