Dear List,
I am using the command plot to present the relationship
between bird richness (Y axis) and elevation (X axis).
However, I would like to observe
the distributions of bird richness in different administrative areas (A, B,
C,
., G) in this plot.
For example, the dots in area A might fall in the upper right part of the
plot, while those in area B might appear in the middle of the elevation
range.
Please kindly advise how to differentiate the dots in distinct areas using
colors.
Thank you.
Elaine
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