You need to create a fourth set of data that combines all three of your
existing sets of data. Add the fourth set of data to your scatter plot as a
new series. Select that series and add a trendline to it. Then format the
series to have no lines and no symbols to it disappears. What you're left
with is the original three series, each with a unique format, and the
trendline that fits all of the data.

HTH,

Eric

"shafierin" wrote:


how can i add trendline or best fit line on a scatter plot which has
multiple set of data. for example, i had 3 set of data for 3 different
depth (0cm,15cm and 30cm) and i plot all three in a scatter plot. is it
posible if i want only a line for describe all three depth despite of
having a line for each color (3 line for 3 depth). or if i made all 3
depth together in one set of data and get a trendline from that
scatter, how i can differentiate which point is 0cm, 15cm and 30cm?




--
shafierin
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