The problem is that "" looks like a blank, but Excel does not treat it as a
blank. Excel treats it like any other text, and assigns it a value of zero.

Unfortunately Microsoft has not provided a function that returns a blank.
The best we can do is use NA(), which places an #N/A error in the cell. Line
and XY series do not plot a point if a cell contains #N/A.

Your formula should look like

=IF(<something,<value,NA())

- Jon
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Jon Peltier, Microsoft Excel MVP
Peltier Technical Services, Inc.
http://PeltierTech.com/WordPress/
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"tva11" wrote in message
...
I have a data table with two rows.
One row calculates a percent complete value from the other row. The data
is
monthly. I am charting the results.
The percent complete for a month is blank until I fill in the data for the
month.
The chart is plotting the blank percent complete as a zero.
I set the chart options already to not plot blank cells, but I'm guessing
since there is a formula in there it doesn't think that the cell is blank.
What can I do?