[R] Plot question

Richard M. Heiberger rmh at temple.edu
Fri Dec 14 15:56:11 CET 2007

The easiest way would be to use the HH package, which you can get from CRAN.

Marc's example is limited to integers on the X axis.  Using positioned(),
which is
an extension to ordered(), allows arbitrary values.  Building on that


CV <- rnorm(100)
FV <- sample(c(-1.4, 3.2, 5), 100, replace = TRUE)

bwplot(CV ~ positioned(FV))

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On
Behalf Of Alan Barnett
Sent: Friday, December 14, 2007 08:16 AM
To: R-Help
Subject: [R] Plot question

I have some data consisting of multiple trials of an experiment with 
different values of an independent variable.  If I run
R> plot(var,result)
I get a scatterplot of result versus the independent variable var.
If I run
R> plot(as.factor(var),result)
I get a boxplot of the distribution of result for each value of var.  In 
this plot, each boxplot is labeled by the corresponding value of var, 
but the absissas are evenly spaced.
Is it possible to generate a boxplot with the absissas of each boxplot 
equal to the corresponding value of var?

Alan Barnett, PhD
Imaging Physicist
National Institutes of Health
301 402 3507

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