It may not be misleading, but does it really help you understand the problem more than a scatterplot of rugosity vs. elevation would?
Hadley On 10/1/07, Monica Pisica <[EMAIL PROTECTED]> 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" <[EMAIL PROTECTED]> > Subject: Re: [R] Graphics and LaTeX documents with the same font > To: "Frank E Harrell Jr" <[EMAIL PROTECTED]> > Cc: R-help <[EMAIL PROTECTED]> > Message-ID: > <[EMAIL PROTECTED]> > 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 > > > > ________________________________ > Get news, entertainment and everything you care about at Live.com. Check it > out! -- http://had.co.nz/ ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
