[R] barplot with varaible-width bars
Gould, A. Lawrence
larry_gould at merck.com
Mon Jan 31 20:42:28 CET 2011
Bill Pikounis provided a clever and elegant solution: in the program barplot.default, replace the statement
width <- rep(width, NR)
that occours around line 51 ( NR = nrow(height) ) with the statement width <- width. I renamed the program
and attached it to this email. The attachment also includes a function called mulbarX.fn that mimics the
behavior of the original SPlus function mulbar. The call
mulbarX.fn(yy[,2*1:5],yy[,2*1:5-1],xlab="Baseline Category",ylab="Incidence",main="Main Title",sub="Low Volume",legendtxt=c("P","F"),ylim=c(0,0.15),
+ categlabs=c("Stratum 1","Stratum 2","Stratum 3","Stratum 4","Stratum 5"),legendinset=0.1,labcex=1.2)
produces a result that is very close to what the SPlus function produces. This approach uses only basic R
graphics. I imagine that it could be extended/incorporated into lattice or ggplot2 graphics.
From: Gould, A. Lawrence
Sent: Tuesday, January 25, 2011 10:48 AM
To: 'r-help at r-project.org'
Subject: barplot with varaible-width bars
I would like to produce a bar plot with varying-width bars. Here is an example to illustrate:
ww <- c(417,153,0.0216,0.0065,556,256,0.0162,0.0117,
produces a barplot of 5 pairs of bars that are of equal width
makes the bars in each pair of unequal width, but the two widths do not vary from pair to pair
I would like the width of each bar to be proportional to its corresponding value in the width statement of this last call of barplot, like what I think could be done with the mulbar function of SPlus. Can I do this with barplot itself, or is this something for which lattice or ggplot 2 is needed? And, if so, what would typical code look like?
Thanks for your help.
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