[R] lattice : superpose symbols with a great many points

Duncan Mackay dulcalma at bigpond.com
Sun Jun 22 10:43:49 CEST 2014



xyplot(y ~ x,  ... pch = ".", cex = 2)

You may be able to get away with cex = 1 on certain drivers but for most
instances cex = 2 will be the smallest size.



Duncan Mackay
Department of Agronomy and Soil Science
University of New England
Armidale NSW 2351
Email: home: mackay at northnet.com.au

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On
Behalf Of Laurent Rhelp
Sent: Saturday, 21 June 2014 05:45
To: r-help at stat.math.ethz.ch
Subject: [R] lattice : superpose symbols with a great many points


   I like to use with xyplot (package lattice) the groups argument and 
superpose.symbol to compare several curves. But, when there are a great 
many points, the symbols are very close and the graph becomes 
unreadable. Would there be an argument  or a tip not to draw all the 
symbols, for example the symbols could be drawn only every x points, x 
given as an argument ?

Best regards

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