[R] Two lines, two scales, one graph

David Winsemius dwinsemius at comcast.net
Tue Aug 25 01:23:42 CEST 2009

On Aug 24, 2009, at 7:01 PM, Felix Andrews wrote:

> 2009/8/25 David Winsemius <dwinsemius at comcast.net>
>> On Aug 24, 2009, at 11:00 AM, Rick wrote:
>>> I would like to plot two variables against the same abscissa  
>>> values. They
>>> have different scales. I've found how to make a second axis on the  
>>> right
>>> for labeling, but not how to plot two lines at different scales.
>> After using R site search I would ask: have you looked at as.layer  
>> in {latticeExtra}?
> Don't use as.layer().  For this purpose it has been replaced by
> doubleYScale(), also in the latticeExtra package.

Interesting. I just downloaded lattice Extra from CRAN this afternnon  
intending to look for doubleYscale and could not find it. So I looked  
for a substitute:

 > sessionInfo()
R version 2.9.1 Patched (2009-07-04 r48897)


attached base packages:
[1] splines   stats     graphics  grDevices utils     datasets   
methods   base

other attached packages:
[1] latticeExtra_0.5-4 lattice_0.17-25    RColorBrewer_1.0-2  
[5] survival_2.35-4    Hmisc_3.5-2        plotrix_2.5-4

loaded via a namespace (and not attached):
[1] cluster_1.12.0 grid_2.9.1     tools_2.9.1

David Winsemius, MD
Heritage Laboratories
West Hartford, CT

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