You can use a dynamic range name for your data.
Create a range named "data' with the following in the "refers to"
block
=OFFSET(Sheet1!$B$1,0,0,30,1)
where your data would be in the first 30 rows of column B. Then
assign the range "data" to the "series values" of the appropriate data
series. The sheet name needs to be included in the "series values"
block (ie ='sheet1'!data").
Good luck.
Ken
Norfolk, Va
> How do I add a cell to a data series without changing the range of the
> data series? I have a line chart with a line that represents only 30
[quoted text clipped - 6 lines]
> naming the range and using the name in the data series, but after
> doing the update/insert, the range grows to 31 days.