I find them helpful for displaying the differences in coupled biomarkers
between therapies with different therapeutic targets.  You can quickly
see/show which marker is affected quicker and then the other compensating in
response and how they can be reversed depending on target. Having each
measure on its own actual scale and not having to do something like percent
change over time is very helpful (for many biomarkers it's hard to judge the
clinical relavence of scaled values).  

I believe in looking at the data in numerous ways, to help myself from
confusing or misleading myself--which is not my intent.

--Matt Austin
Statistician, Amgen Inc.

-----Original Message-----
From: r-help-bounces@r-project.org [mailto:r-help-bounces@r-project.org] On
Behalf Of hadley wickham
Sent: Friday, September 28, 2007 10:14 AM
To: Frank E Harrell Jr
Cc: R-help
Subject: Re: [R] Graphics and LaTeX documents with the same font

> 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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