You can use the NA() function to do this.

"Ken" wrote in message
...
I have a chart with twelve months of data that is generated by using a
fomula:
Cell A1 has the following: =IF(A25,A2*A3,"")
Cell B1 contains: =IF(B25,B2*B3,"")

These fomulas go out for twelve cells and are the source data for my line
chart.

I have only the first six cells with data in them and when I set up my
chart
I get the first six data points plus six data points at the zero value of
the
Y-axis.

Can I suppress the data points where the formula returns a null value?

TIA.