thanks John, it is a combinmed line and bar chart and the data set i am
trying to interpoolate is graphed as a line - any suggestions?

"Jon Peltier" wrote:

This setting is available only for line and XY charts. (It's also available
for Area charts, but does not cause interpolation of the data).

- Jon
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Jon Peltier, Microsoft Excel MVP
Tutorials and Custom Solutions
http://PeltierTech.com
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"Tarra" wrote in message
...
tool - options - chart cannot check interpolate so the missing data
between
my data set interpolates to value