Sean,

You can add a trendline to see what type of fit works best. When the chart is selected, used Chart
/ Add Trendline...
then choose from logarithmic, exponential, polynominal, power series, etc. When you have selected a
type of curve (depending on the quality of the fit), double click on the new trend line and then on
the Options tab of the dialog that opens, select "Display equation on chart" and "Display R-squared
value on Chart"

HTH,
Bernie
MS Excel MVP


"mcgradys" wrote in message
...

Hi all,

Newbie to this forum, but need some excel help. I have collected a
bunch of data from an object as it heats up. The curve is very similar
to a capacitor charging current curve. In my case, manually trying to
approximate this curve, I come up with a formula of y=
(rise)*(1-exp(-time))+ambient. Is there a way in excel to fit a curve
like this or do I need an aftermarket solution? I need something that
will use the data points and perform calculations to determine the
curve.

Thanks,

Sean


--
mcgradys