[R] xyplot() with discontinuous x-axis variable

[Duncan Mackay]

Hi Rich

This is a case of where data needs to be supplied to go further.

Regards

Duncan

Duncan Mackay
Department of Agronomy and Soil Science
University of New England
Armidale NSW 2351

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On
Behalf Of Rich Shepard
Sent: Friday, 6 September 2013 06:24
To: r-help at r-project.org
Subject: [R] xyplot() with discontinuous x-axis variable

   My xyplot() with superposed multiple condiions looks better with lines
than with points (it's easier to see changes over time with the lines). But,
there are gaps in the years (the x axis) for which there are data to be
plotted. For example, there are data for years 2004-2006 and 2010-2012, but
not for 2007-2009. I would like to have the lines for only the two groups
with data.

   Reading ?xyplot suggests that the group attribute might do the job but I
do not see how to write the equation.

   Is it possible to plot with lines on discontinuous data or should I use
large, solid circles for each year's data points?

Rich

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