XL98: Area Charts Ignore "Empty Cells Plotted As" Setting

ID: Q191968

The information in this article applies to:

Microsoft Excel 98 Macintosh Edition

SYMPTOMS

In Microsoft Excel, an area series in a chart will ignore the "Empty cells plotted as" setting on the Chart tab of the Preferences dialog box.

CAUSE

The options under the "Empty cells plotted as" setting are designed to be used with line, x-y (scatter), and radar charts. Chart types such as pie, doughnut, column, and bar do not usually benefit from these settings. Also, even though area charts are very similar to line charts, changing these settings has no effect on the appearance of an area series in a chart.

This behavior is by design of Microsoft Excel.

WORKAROUND

To work around this problem, you can interpolate missing data points and format the area chart (the result will be similar to the way the Interpolated option works with other charts).

To see an example that demonstrates the workaround, follow these steps:

Enter the following data in a new worksheet:
A1: 1
A2: 2
A3:
A4:
A5: 5

Create an area chart based on the data in step 1.

Your area chart will drop off to the x-axis between the third and fourth data points.

In cell B1, enter the following formula:
=($A$5-$A$2)/(ROW($A$5)-ROW($A$2))
This formula calculates the interpolation step value between the two known values that lie at the ends of the missing value (2 and 5).

In cell A3, enter the following formula:
=A2+$B$1

Use the fill handle to fill the formula down to cell A4.

The resulting filled data will be:


   A1: 1
   A2: 2
   A3: 3
   A4: 4
   A5: 5

Your area chart will not drop down to zero for the missing data points.

MORE INFORMATION

The "Empty cells plotted as" setting on the Chart tab in the Preferences dialog box allows you to determine how Microsoft Excel will handle empty cells that are contained within a range of data. For example, if you create a line chart using the following data


   A1: 1
   A2: 2
   A3: <empty>
   A4: <empty>
   A5: 5

the empty cells will be plotted according to the option that you specify.

The following table explains how Microsoft Excel would plot the example range A1:A5, for each option you can choose.


   This setting   Would have this result
   --------------------------------------------------------------------

   Not Plotted    The line exists from 1 to 2 and a single point exists
                  at 5. There is a gap in the line where the values
                  from A3 and A4 would normally appear.

   Zero           The line proceeds from 1 to 2, then to zero (A3 and
                  A4 are interpreted as zero). The line then proceeds
                  to 5.

   Interpolated   The line proceeds from 1 to 2, "bridges" the gap at 3
                  and 4, and then proceeds to 5.

Additional query words: XL98

Keywords : kbdta kbchart
Version : MACINTOSH:98
Platform : MACINTOSH
Issue type : kbprb