[R] Thinking about using two y-scales on your plot?

[Jan T. Kim]

On Tue, Mar 25, 2008 at 05:29:38PM -0500, hadley wickham wrote:
> Please read this first:
> http://www.perceptualedge.com/articles/visual_business_intelligence/dual-scaled_axes.pdf

Thanks for this pointer, interesting read. As an additional alternative
to dual scales, le'ts not forget about scatterplots, which I didn't
see mentioned in that paper -- frequently, when you're stuck because
you can't dispense with either y-axis, it's easy to forget the option
to do without your current x-axis... ;-)

Best regards, Jan

> It's a reasoned discussion of why it's a bad idea and proposes some
> alternative methods.
> 
> Another good article is:
> K. W. Haemer. Double scales are dangerous. The American Statistician,
> 2(3):24?24, 1948.
> 
> People have been advising dual-axis plots for (at least) 60 years!
> 
> Hadley
> 
> -- 
> http://had.co.nz/
> 
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-- 
 +- Jan T. Kim -------------------------------------------------------+
 |             email: jtk at cmp.uea.ac.uk                               |
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