I've encountered a problem that seems like it should be easy but I've
played with it and can't get it to work acceptably.

I have 2 y-variables related to a single x variable. Specifically I'm
comparing Parallax shift to distance and the associated percent error
of distance measurement to the distance.

The x, of course is my actual distance to the star. One y quantity is
parallax shift. The other is % Error.

I can get Excel to do a double y line graph, no problem. My problem
stems from the fact my x data values are not evenly distributed as an
Excel line graph plots them to be. A scatter graph plots correctly but
that only gives me a single y-axis and both lines are plotted against
the same scale.

What I need is a scatter plot that will have 2 y-axis and then I can
insert a trendline for each quantity.

Any help?


--
Chikngizrd


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