[R] Graphics and LaTeX documents with the same font - multiple y-axes

hadley wickham h.wickham at gmail.com
Mon Oct 1 17:43:44 CEST 2007

It may not be misleading, but does it really help you understand the
problem more than a scatterplot of rugosity vs. elevation would?


On 10/1/07, Monica Pisica <pisicandru at hotmail.com> wrote:
>  Well,
>  I agree that plots with multiple y-axes can be very confusing but .... i am
> not sure that always they are also misleading .... One time i was asked to
> make a 2 y-axes plot, one y axes was for elevation (heights in meters) and
> one for rugosity (values between 1 and 2 - unitless). The idea was to
> visualize that for a more complex profile the rugosity is higher than for a
> flatter terrain. A correlation coefficient between elevation and rugosity
> does not show anything, although depending which formula you use for
> calculating rugosity, it can nicely correlate with slope. Rugosity is a
> measure of the complexity of the terrain but is quite independent of
> elevation.
>  I am not sure if this example meets your approval, but i don't think it is
> misleading ;-)
>  Monica
> _______________________________________________________________
>  Message: 49
> Date: Fri, 28 Sep 2007 12:13:46 -0500
> From: "hadley wickham" <h.wickham at gmail.com>
> Subject: Re: [R] Graphics and LaTeX documents with the same font
> To: "Frank E Harrell Jr" <f.harrell at vanderbilt.edu>
> Cc: R-help <r-help at stat.math.ethz.ch>
> Message-ID:
> <f8e6ff050709281013i7209b684r63aa0d8fcd69d4ef at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> > Yes there is harm. But to make bold lines, easy to read titles is fine.
> > See the spar function in
> >
> http://biostat.mc.vanderbilt.edu/SgraphicsHints
> for a starter. Also see
> > the setps, ps.slide, and setpdf functions in the Hmisc package.
> I was interested to see that you have code for drawing scatterplots
> with multiple y-axes. As far as I know the only legitimate use for a
> double-axis plot is to confuse or mislead the reader (and this is not
> a very ethical use case). Perhaps you have a counter-example?
> Hadley
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