Arrange data on a worksheet with current (X) in a column on the left and
voltage (Y) in an adjacent column on the right. Select data (both X and Y
values) for one type of system, click the ChartWizard, and create an XY
(Scatter) chart. For each other type, choose Chart | Source Data | Series,
and add each set of X and Y values as a separate data series. Then you can
select and format each data series if you wish.

- Mike

www.mikemiddleton.com

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"frances" wrote in message
...
I would like to know how to plot multiple sets of data on a scatter graph
for example i have 3 sets of data for three types of lighting systems,
red, green and blue i want to plot the voltage againt the current, and i
want all the data on one graph so i can compare them, how do i do it? <